Antiretroviral Postexposure Prophylaxis After Sexual, Injection Drug Use, or Different Nonoccupational Publicity to HIV — CDC Suggestions, United States, 2025

Suggestions

The next part supplies suggestions to clinicians from the start of the nPEP analysis to the completion of nPEP remedy (Field 2). “HIV nPEP Indications” particulars the conditions during which nPEP ought to and shouldn’t be administered. “Time to Initiation of HIV nPEP” stresses fast initiation of nPEP and explains the rationale behind this suggestion. “HIV nPEP Regimens” supplies most well-liked and various nPEP regimens. “Laboratory Testing and nPEP Observe-Up” outlines preliminary and monitoring laboratory assessments really helpful for nPEP. Lastly, “Transitioning to PrEP after PEP” outlines the indications for and administration of transitioning individuals from nPEP to PrEP.

HIV nPEP Indications

HIV nPEP is indicated to scale back the chance for buying HIV from an publicity that presents a considerable danger for HIV acquisition. Assessing the probability of HIV acquisition related to an publicity requires consideration of a number of components, together with whether or not the supply has HIV, the supply’s stage of viremia, the physique fluid concerned within the publicity, the publicity website, presence of obstacles to physique fluid publicity, and whether or not the uncovered particular person is on PrEP.

Suggestions for HIV nPEP Indications

• nPEP is really helpful when an publicity has occurred inside the previous 72 hours that presents a considerable danger for HIV transmission and the supply has HIV with out sustained viral suppression or their viral suppression data shouldn’t be identified (good observe assertion, current suggestion).
• A case-by-case dedication is required when an publicity has occurred inside the previous 72 hours that presents a considerable danger for HIV transmission, however it isn’t identified whether or not the supply has HIV (good observe assertion, current suggestion).
• nPEP shouldn’t be really helpful if the publicity presents no substantial danger for HIV transmission (good observe assertion, current suggestion).
• nPEP ought to be stopped if at any level in the course of the course the supply is discovered to not have HIV (good observe assertion, current suggestion).

Rationale for HIV nPEP Indications

Extra details about particular publicity eventualities and sources to help with particular person determinations is on the market (Desk 1) (Appendix A). Determination algorithms can be found to offer context for the chance for HIV acquisition related to numerous exposures (Desk 2) (Figures 2, 3, and 4) (16–19). Knowledgeable session is on the market to help well being care professionals with assessing the HIV acquisition danger related to various kinds of HIV publicity or with different questions related to offering nPEP. Well being care professionals can seek the advice of the NCCC at 888-448-4911 or https://nccc.ucsf.edu/clinician-consultation/pep-post-exposure-prophylaxis.

Knowledge usually are not accessible to find out all eventualities during which the HIV prevention advantages of nPEP exceed any potential harms. Notably, modern ARVs now accessible for nPEP regimens are each safer and extra tolerable than earlier ARVs. These advances have considerably lowered potential harms related to a time-limited publicity to those medicine when used as nPEP (20). Frequent publicity eventualities and nPEP issues are supplied (Appendix A). Every nPEP analysis requires particular person danger evaluation and counseling.

HIV Standing of the Supply

If an individual doubtlessly uncovered to HIV doesn’t know the supply’s HIV standing, the clinician ought to proceed with figuring out whether or not nPEP is indicated primarily based on the accessible data (Appendix A). HIV nPEP shouldn’t be delayed for the aim of investigating the supply’s HIV standing. The primary dose of HIV nPEP ought to be given to the uncovered particular person as quickly as attainable. HIV nPEP ought to be stopped if the supply is decided to not have HIV.

HIV testing for the supply ought to be supplied if they’re accessible, are unaware or not sure of their HIV standing, and conform to testing. Concerns about the kind of HIV check to make use of for the supply and testing for different STIs are much like these issues for evaluating individuals uncovered to HIV (Desk 3). For individuals being examined or provided testing for HIV, clinicians also needs to assess for behaviors related to HIV publicity and transmission, guarantee confirmatory testing is carried out, hyperlink the particular person to care if the check result’s optimistic, and supply HIV PrEP counseling and providers if the HIV check result’s adverse.

If the supply is thought to have HIV, details about their present viral load and adherence with antiretroviral remedy (ART), historical past of ARV remedy regimens, and HIV resistance testing are related for the care of the uncovered particular person. If the supply consents to share this data and it’s instantly accessible on the time of nPEP analysis, the clinician ought to take into account whether or not the supply has sustained viral suppression and, due to this fact, shouldn’t be anticipated to transmit HIV (Appendix A). When nPEP is indicated, clinicians ought to take into account all accessible data as described to design an nPEP routine more than likely to be lively towards the HIV to which the particular person was uncovered (see HIV nPEP Regimens).

nPEP within the Context of PrEP and PrEP Adherence

A pharmacokinetics examine amongst homosexual, bisexual, and different males who’ve intercourse with males (GBMSM) taking tenofovir disoproxil fumarate (TDF) as PrEP estimated that HIV danger discount efficacy was 99% for ≥4 doses per week and 84% for two–3 doses per week (21–23). A laboratory examine measuring vaginal tissue ranges of lively metabolites of TDF and emtricitabine (FTC) discovered that drug ranges related to important safety towards HIV an infection required 6–7 doses per week (>85% adherence) for decrease vaginal tract tissues (24). When information are restricted (e.g., for injectable PrEP and intermittent PrEP), it could be prudent to contemplate any sample of use outdoors present guideline suggestions as being nonadherent and provide individuals with HIV publicity PEP whereas nonadherent on PrEP (5). Individuals with repeat or persevering with publicity to HIV after the tip of the nPEP course ought to be provided PrEP to scale back their danger for buying HIV.

Time to Initiation of HIV nPEP

Publicity to HIV is a medical emergency. When indicated, nPEP ought to be initiated as quickly as attainable in the course of the medical encounter with confirmed linkage to follow-up care Accessible medical proof means that the shorter the time from HIV publicity to nPEP initiation, the better the probability of stopping HIV acquisition (25).

Advice for Time to Initiation of HIV nPEP

• Provoke nPEP as quickly as attainable, however no later than 72 hours after publicity (good observe assertion, current suggestion).

Rationale for Time to Initiation of HIV nPEP

The 72-hour initiation window for nPEP was established via non-human primate research that demonstrated reducing PEP efficacy with growing time between publicity and ARV initiation. One examine of macaques with vaginal publicity to HIV-2 demonstrated that each one animals given non-oral PEP (subcutaneous TDF for 28 days) began 12 or 36 hours postexposure remained uninfected, in distinction to a few of 4 untreated management animals who acquired HIV-2 an infection (26). Within the group of animals administered PEP 72 hours postexposure, one animal died of causes unrelated to the examine. Among the many three surviving animals, one acquired HIV-2 an infection. A examine of rhesus monkeys with rectal publicity to simian immunodeficiency virus demonstrated that on withdrawal of ARVs 6 months postexposure, viral rebound occurred in 0% (zero of 5), 20% (certainly one of 5), 60% (three of 5), and 100% (5 of 5) of animals that initiated ARVs on day 0 (6 h), 1, 2, or 3, respectively (27).

Proof is inadequate to suggest nPEP initiation later than 72 hours postexposure. Nevertheless, sure specialists have argued that danger versus profit issues may favor an extended initiation window. Newer ARV regimens may presumably forestall institution of HIV an infection >72 hours after publicity, and present most well-liked nPEP regimens are usually protected and effectively tolerated (20). CDC’s HIV oPEP pointers present dialogue for well being care professionals who could be contemplating PEP initiation >72 hours after HIV publicity (5). Individuals looking for nPEP care >72 hours after an HIV publicity ought to be examined for HIV, supplied HIV prevention counseling together with PrEP schooling, and supplied with a tailor-made follow-up plan together with follow-up HIV testing (2,28).

HIV nPEP Regimens

A 28-day course of nPEP is really helpful for individuals with out HIV who search care ≤72 hours after a nonoccupational publicity to blood, genital secretions, or different doubtlessly infectious physique fluids of individuals identified to have HIV or of unknown HIV standing when that publicity represents a considerable danger for HIV acquisition (25–27,29–32). The purpose of nPEP is to offer a potent, protected, tolerable, and easy-to-adhere-to routine to scale back the chance for HIV transmission and viral replication. The selection of routine ought to be guided by the routine’s efficiency and efficacy, barrier to resistance, antagonistic results profile, comfort, the affected person’s comorbidities and concomitant drugs, and the potential for drug–drug interactions. As a result of adherence is crucial for nPEP efficacy, choice of regimens that reduce unintended effects, the variety of doses per day, and the variety of drugs per dose is preferable.

A fast reference for dosing and fundamental data for ARV drugs in each most well-liked and various nPEP regimens is on the market (Desk 4), as is steering about most well-liked and various regimens for adults and adolescents and regimens for kids, pregnant ladies, and individuals with renal or hepatic dysfunction (Tables 5 and 6). Collection of a routine ought to be individualized primarily based on comorbid situations (e.g., renal or hepatic dysfunction), being pregnant, drug interplay potential with concurrent drugs, earlier publicity to ARV regimens (together with long-acting injectable ARVs), the supply’s historical past, and routine components which may affect adherence (e.g., capsule burden, dosing frequency, unintended effects, value, and entry). Prescribing data together with dosing and potential drug interactions might be discovered within the producers’ package deal inserts, the Nationwide Institute of Well being’s (NIH’s) Tips for the Use of Antiretroviral Brokers in Adults and Adolescents (https://clinicalinfo.hiv.gov/en/pointers/hiv-clinical-guidelines-adult-and-adolescent-arv/whats-new), and the College of Liverpool HIV drug interplay checker (https://www.hiv-druginteractions.org).

Suggestions for HIV nPEP Regimens

• Full a medical evaluation earlier than prescribing nPEP, together with assessing for medical comorbidities, present drugs, and allergic reactions (good observe assertion, normal of care).
• The really helpful nPEP course is 28 days (good observe assertion, current suggestion).
• The popular regimens for adults and adolescents with out contraindications are
  • º bictegravir (BIC)/emtricitabine (FTC)/tenofovir alafenamide (TAF) (suggestion, very low certainty of proof) OR
  • º dolutegravir (DTG) plus (tenofovir alafenamide [TAF]) OR tenofovir disoproxil fumarate [TDF]) plus (emtricitabine [FTC] OR lamivudine [3TC]) (suggestion, very low certainty of proof).
• Collection of a routine ought to be individualized primarily based on comorbid situations (e.g., renal or hepatic dysfunction), being pregnant, drug interplay potential with concurrent drugs, earlier publicity to ARV regimens (together with long-acting injectable ARV publicity), the supply’s historical past, and routine components which may affect continuation of remedy (e.g., capsule burden, dosing frequency, unintended effects, value, and entry) (good observe assertion, normal of care).

Rationale for HIV nPEP Regimens

No randomized, placebo-controlled medical trial of nPEP efficacy has been carried out. A restricted variety of research have evaluated the penetration of ARVs into genital tract secretions and tissues, though information are inadequate to outline any ARV routine as simplest for HIV prevention (33–36). Knowledge related to nPEP suggestions can be found from animal research (37–40), potential open-label randomized and nonrandomized experimental research, longitudinal and observational cohort research, case research of nPEP use, and HIV remedy medical trials (Supplementary Appendix A: Advice Power & Rationale and Supplementary Appendix B: GRADE Tables, https://stacks.cdc.gov/view/cdc/177225#tabs-3). Regimens chosen for nPEP pointers are primarily based on greatest accessible proof on the time of pointers publication; newer regimens which may turn into really helpful for preliminary HIV remedy sooner or later additionally could be efficient for nPEP (Appendix B).

The overall suggestion for a 3-drug nPEP routine relies on extrapolation of knowledge demonstrating that the maximal suppression of viral replication amongst individuals with HIV happens when mixture ARV remedy with ≥3 medicine is supplied as preliminary remedy (41). Additionally, the really helpful 3-drug nPEP regimens are anticipated to offer better probability of safety towards acquisition of resistant HIV in contrast with a 2-drug routine (e.g., TDF/FTC) (42–44). As well as, the finite period of nPEP implies that the chance for cumulative toxicity of 3-drug regimens is small (20,45,46). Though it’s included as a attainable preliminary HIV remedy routine in present grownup HIV remedy pointers, the 2-drug mixture DTG/3TC shouldn’t be a really helpful nPEP routine due to the caveats associated to its use as preliminary remedy (e.g., not used when HIV RNA >500,000 copies/mL; not used earlier than HIV genotypic resistance testing is on the market) and since no information can be found associated to its use for nPEP (47). Recommending a 3-drug routine for all sufferers who obtain nPEP will enhance the probability of profitable prophylaxis contemplating potential publicity to virus with resistance mutations (8). As well as, if an infection happens regardless of nPEP, a 3-drug routine is extra more likely to restrict emergence of resistance than a 2-drug routine. Sure well being care professionals have prescribed 2-drug regimens for nPEP (e.g., TDF plus FTC) in sure circumstances, similar to issues of discontinuation of remedy, toxicity, or entry to drugs. Knowledge are inadequate to help a normal suggestion for 2-drug regimens (see Future Analysis).

Most popular and Different HIV nPEP Regimens

Most popular nPEP regimens for each kids aged ≥2 years and adults include two nucleoside reverse transcriptase inhibitors (NRTIs) mixed with a second-generation integrase strand switch inhibitor (INSTI) (e.g., bictegravir or dolutegravir). Antiviral efficacy, affected person tolerance and acceptability, and entry had been thought-about in choice of the regimens listed (Tables 4 and 5). In sure circumstances, well being care professionals could think about using ARV regimens for nPEP aside from these listed (e.g., in distinctive affected person circumstances similar to an publicity supply with identified drug resistance or affected person contraindications to a number of ARVs). In these instances, well being care professionals are inspired to hunt session with different clinicians educated in utilizing ARV drugs for comparable sufferers (e.g., kids, pregnant ladies, and individuals with comorbid situations).

Clinicians can use native sources or seek the advice of the NCCC PEPline at 888-448-4911 or https://nccc.ucsf.edu/clinician-consultation/pep-post-exposure-prophylaxis. If session or most well-liked regimens usually are not instantly accessible, any 3-drug routine appropriate for preliminary remedy of HIV might be used, supplied it doesn’t require pretesting (e.g., abacavir) and isn’t contraindicated (47). Though a raltegravir-based routine shouldn’t be listed due to having a better capsule burden and thus potential for discontinuation of remedy, it stays an efficient possibility for nPEP if neither most well-liked nor various regimens might be prescribed.

Choosing an Preliminary HIV nPEP Routine

Collection of an preliminary HIV nPEP routine ought to be individualized. The choice ought to be primarily based on comorbid situations (e.g., renal or hepatic dysfunction), being pregnant, drug interplay potential with concurrent drugs, earlier publicity to ARV regimens (together with long-acting injectable), supply’s historical past (e.g., drug-resistant virus), and routine components (e.g., capsule burden, dosing frequency, unintended effects, value, and entry) that facilitate adherence.

Presence of Sure Situations

Sure comorbid situations and co-infections may need a direct affect on the selection of nPEP routine, dosing, and diploma of monitoring required (Tables 5 and 6). Uncovered individuals who’ve impaired renal operate may require dose changes of ART drugs used for PEP and may require further creatinine monitoring whereas finishing a 28-day course of PEP. For instance, TDF, when used for remedy of HIV an infection, has been related to proximal renal tubulopathy and better charges of renal dysfunction, whereas TAF has much less affect on renal operate. These antagonistic occasions are much less frequent with PEP due to its quick period (48). The danger for lowered tolerability and different toxicities related to various regimens (e.g., zidovudine with lamivudine) should be thought-about, particularly if there’s a plan for PrEP after completion of nPEP (49). Liver illness with cirrhosis could be a contraindication for sure ARV regimens or may require ARV dosage modifications in individuals with Baby-Pugh class B or C illness (47). If co-infection with hepatitis B virus (HBV) is current, regimens that include brokers that deal with HBV could be most well-liked (e.g., tenofovir and 3TC/FTC-containing regimens) (50,51).

Extra monitoring is required for uncovered individuals who’ve HBV an infection, particularly when stopping brokers which might be lively in remedy for HBV an infection (47). Elevation in liver transaminase stage can happen when taking or after discontinuing ARVs and could be extra frequent in individuals with HBV or hepatitis C virus (HCV) an infection (52). Drug-induced liver damage is extra frequent in sufferers with HCV/HIV co-infection (47,53). In instances of HBV/HCV co-infection, remedy with direct-acting antiviral (DAA) brokers for power HCV have been reported to reactivate HBV (54). For individuals with HBV/HCV, on DAAs, or each, well being care professionals are inspired to hunt session with different clinicians educated in utilizing ARV drugs for comparable sufferers. Different comorbid situations that ought to be thought-about embody osteoporosis or different situations related to bone mineral density loss, heart problems, psychiatric sickness, and substance use dysfunction requiring narcotic substitute (47). For extra data concerning particular medical eventualities, see the desk “Antiretroviral Routine Concerns for Preliminary Remedy Based mostly on Particular Scientific Eventualities” of the NIH’s Tips for the Use of Antiretroviral Brokers in Adults and Adolescents with HIV (https://clinicalinfo.hiv.gov/websites/default/information/pointers/paperwork/adult-adolescent-arv/tables-adult-adolescent-arv.pdf).

Normal Concerns for Pregnant or Breastfeeding Girls and Girls of Childbearing Potential

Being pregnant and breastfeeding usually are not contraindications for nPEP. Pregnant or breastfeeding ladies ought to have fast entry to nPEP when indicated. Due to the extra issues concerning fetal and toddler security, professional session could be useful when nPEP is prescribed to ladies who’re pregnant or breastfeeding.

A being pregnant check ought to be carried out in ladies of childbearing potential on the preliminary analysis for nPEP. For ladies who’re pregnant, take into account accessible being pregnant security and end result information, identified antagonistic results, and pharmacokinetic properties of ARVs. Dangers for antagonistic results of ARVs to pregnant ladies and their fetuses or infants should be weighed towards the dangers for maternal HIV acquisition and subsequent potential perinatal HIV transmission. The appendix “Security and Toxicity of Particular person Antiretroviral Brokers in Being pregnant” of the HHS Suggestions for the Use of Antiretroviral Medication Throughout Being pregnant and Interventions to Scale back Perinatal HIV Transmission in america could be helpful for well being care skilled assessment and counseling of pregnant ladies (https://clinicalinfo.hiv.gov/websites/default/information/pointers/paperwork/perinatal-hiv/guidelines-perinatal.pdf) (6). Pharmacokinetic modifications in being pregnant may result in decrease plasma ranges of sure ARVs and may require elevated doses or extra frequent dosing (Tables 4 and 6). Medication not really helpful to be used in being pregnant due to lack of obtainable security and pharmacokinetic information or attainable inferior virologic efficacy embody cobicistat-boosted atazanavir, darunavir, and elvitegravir (6). Well being care professionals should acknowledge that security information of ARV medicine in being pregnant could be incomplete. Nevertheless, strong medical expertise with ART in being pregnant consists of evidence-based nationwide pointers recommending ART for all ladies with HIV who’re pregnant (6). Extra details about ARV use in pregnant ladies is on the market (https://clinicalinfo.hiv.gov/websites/default/information/pointers/paperwork/perinatal-hiv/guidelines-perinatal.pdf) (6).

Offering nPEP to ladies who’re breastfeeding and are at substantial danger for HIV acquisition due to current publicity reduces the chance for HIV acquisition and attainable subsequent HIV transmission to the breastfeeding toddler. Girls who’re breastfeeding ought to be recommended on the chance for HIV transmission via breastmilk ought to acute HIV an infection happen. To get rid of any danger for HIV transmission to infants, HIV-exposed breastfeeding ladies may resolve to cease breastfeeding. Different ladies who’re breastfeeding may select different programs of motion (e.g., pumping and storing breastmilk till HIV an infection is excluded, after which resuming the earlier breastfeeding routine). Girls who’re breastfeeding additionally could be involved about toddler publicity to ARVs via breastmilk. The “Security of Antiretroviral Medication Throughout Breastfeeding” portion of the “Toddler Feeding for People with HIV in america” part of the HHS Suggestions for the Use of Antiretroviral Medication Throughout Being pregnant and Interventions to Scale back Perinatal HIV Transmission in america supplies an summary of the various penetration of various ARVs into breastmilk and is a helpful useful resource to help counseling of ladies who’re breastfeeding prescribed nPEP (https://clinicalinfo.hiv.gov/websites/default/information/pointers/paperwork/perinatal-hiv/guidelines-perinatal.pdf) (6). High quality counseling helps shared decision-making concerning toddler feeding throughout an nPEP course for a mom who’s breastfeeding. Well being care professionals with questions on medical decision-making or counseling for girls who’re pregnant or breastfeeding with nPEP indications can use native session sources or seek the advice of the NCCC PEPline at 888-448-4911 or https://nccc.ucsf.edu/clinician-consultation/pep-post-exposure-prophylaxis or the Perinatal HIV Line at 888-448-8765 or https://nccc.ucsf.edu/clinician-consultation/perinatal-hiv-aids.

Drug–Drug Interactions and Remedy-Associated Hostile Occasions

Pharmacokinetic drug–drug interactions between nPEP regimens and concomitant drugs are frequent and may result in elevated or decreased drug publicity. In sure cases, modifications in drug publicity may enhance toxicity frequency, severity, or each. Earlier than prescribing nPEP, an correct, verified medicine historical past ought to be obtained, together with the usage of over-the-counter drugs, nutritional vitamins, minerals, and natural cures, to establish attainable drug–drug interactions. Well being care professionals are inspired to test for drug–drug interactions by utilizing an interactive web-based useful resource similar to from the College of Liverpool (https://www.hiv-druginteractions.org), producers’ package deal inserts, and the NIH’s Tips for the Use of Antiretroviral Brokers in Adults and Adolescents with HIV (https://clinicalinfo.hiv.gov/en/pointers/hiv-clinical-guidelines-adult-and-adolescent-arv/whats-new).

Merchandise that include polyvalent cations (aluminum, calcium, iron, and magnesium), similar to antacids or multivitamins, can bind to INSTIs and scale back absorption of the nPEP brokers. Medication or dietary supplements that induce or inhibit the enzyme cytochrome P450 (CYP) 3A4 or efflux transporter P-glycoprotein within the intestines may scale back or promote the absorption of different medicine. Of notice, the INSTIs bictegravir and dolutegravir have combined metabolic pathways, together with each CYP3A4 and uridine diphosphate glucuronosyltransferase (UGT) 1A1 enzyme (UGT1A1). Medication that induce or inhibit these enzymes may need variable affect on the pharmacokinetics of those brokers. Subsequently, a number of ARV brokers are contraindicated with concomitant use of sure drugs (e.g., rifabutin and rifampin). Medication that scale back gastric acidity (e.g., proton pump inhibitors) may have an effect on the absorption of ARV brokers that require acidity for optimum absorption (e.g., rilpivirine). Drug transporters even have a job in drug–drug interplay potential. For instance, dolutegravir decreases renal clearance of metformin by inhibiting natural cation transporters in renal tubular cells. Subsequently, metformin dosing ought to be restricted to 1 g by mouth per day when an individual is taking dolutegravir concurrently.

Newer ARV regimens, similar to these really helpful for nPEP, are related to fewer severe and insupportable antagonistic results. Nevertheless, antagonistic results have been reported with just about all ARV regimens. Consequently, the potential advantage of nPEP should be balanced with the potential of unintended effects or toxicity, contemplating any comorbidities. When an individual has skilled treatment-limiting tolerability or toxicity points on earlier HIV pre- or postexposure prophylaxis, another routine ought to be prescribed relying on the provision of different drugs and the etiology and severity of the antagonistic occasion. Potential unintended effects of ARV brokers ought to be mentioned with the PEP recipient, and, when anticipated, preemptive prescribing of brokers for ameliorating unintended effects (e.g., prescribing antiemetics or antispasmodic for regimens together with ARVs generally related to nausea, similar to zidovudine and ritonavir) may enhance PEP routine continuity of remedy. The affected person ought to be instructed to succeed in out to their well being care skilled in the event that they expertise ARV-related antagonistic results.

Resistance to ARV Brokers and Supply’s Historical past

If the supply is thought to have HIV and their remedy and testing historical past is on the market on the preliminary nPEP go to, then the nPEP routine might be individualized accordingly. Knowledgeable session could be helpful for choice of an optimum PEP routine to which the supply’s virus is unlikely to be resistant; nevertheless, awaiting professional session shouldn’t delay the initiation of HIV PEP. If the supply’s historical past is unavailable, administration of the uncovered particular person’s first dose of nPEP shouldn’t be delayed. If drug resistance data turns into accessible later throughout a course of PEP, this data ought to be mentioned with the professional advisor for attainable modification of the nPEP routine. Resistance to newer era INSTIs is unusual, and INSTIs are most well-liked if the supply is thought to have HIV or if a drug-resistant virus is a priority (e.g., the supply has failed a number of regimens or doesn’t take their ART as prescribed) (41,42,47). For cases during which nPEP fails to stop an infection, choice of resistant virus by the ARV medicine is theoretically attainable. Nevertheless, due to restricted literature and knowledge on resistance testing in documented nPEP failures, the probability of resistance occurring is unknown.

Earlier publicity to long-acting injectable cabotegravir (CAB-LA) could be a danger for the presence of INSTI resistance (47,55,56). The pharmacokinetic examine HPTN 077 discovered that suboptimal ranges of CAB may last as long as 3 years in males and 4 years in ladies (56). When the supply has detectable viremia whereas on long-acting injectable ART (e.g., cabotegravir) or when the uncovered affected person has a distant historical past of long-acting injectable ARV use, INSTIs won’t be most well-liked (47).

Anticipating and Facilitating Continuity of Remedy

Observational research have reported that continuity of remedy to nPEP regimens typically is insufficient, particularly amongst sexual assault survivors. Clinicians ought to take into account potential obstacles to continuity of remedy when deciding on a nPEP routine, assess for components that would have an effect on continuity of remedy (e.g., concurrent substance use dysfunction), and confer with any wanted providers (57). Discontinuity of nPEP could be influenced largely by the comfort and side-effect profile of the ART routine. Different ARV regimens can be utilized if a earlier ARV routine has not been effectively tolerated.

Remedy continuity might be facilitated by tailor-made approaches to the individuals, which embody 1) prescribing drugs with fewer unintended effects, fewer doses per day, and fewer drugs per dose; 2) educating sufferers concerning potential unintended effects of the precise ARVs prescribed and offering drugs to help if unintended effects happen (e.g., antiemetics); 3) recommending medicine continuity aids (e.g., capsule containers and smartphone reminders); 4) serving to sufferers incorporate doses into their each day schedules; and 5) offering a versatile and proactive means for affected person–well being care skilled contact in the course of the nPEP course (58–60). Additionally, establishing a trusting relationship and sustaining good communication about adherence might help to enhance completion of the nPEP course. Adherence to the nPEP drugs prescribed to kids will depend upon the involvement of and help supplied to oldsters and guardians. Adherence counseling ought to be nonjudgmental and will spotlight a assessment of methods to keep away from missed doses and approaches tailor-made to the particular person (e.g., incorporating the nPEP routine into each day routines or setting smartphone reminders).

Value and Entry

ARV drugs are costly, and individuals in want of nPEP could be unable to cowl the out-of-pocket prices. Making certain nPEP entry requires a radical evaluation of prices and sufferers’ capability to acquire a full course of nPEP. Choices exist to scale back value. When public, privately bought, or employer-based insurance coverage protection is unavailable, well being care professionals can help sufferers with acquiring ARV drugs via the medicine help applications of the pharmaceutical firms that manufacture the prescribed drugs. On-line functions can be found or sure firms might be referred to as on a longtime telephone line. Requests for help typically should be dealt with urgently in order that accessing medicine shouldn’t be delayed. Well being care suppliers also needs to remember that generic ARV choices can be found among the many really helpful nPEP regimens.

Pharmacy dishing out practices have typically been a barrier to well timed nPEP entry as a result of sure pharmacies have insurance policies requiring them to name the prescriber for ARV scripts of 28 days (due to packaging of sure ARVs in 30-day provide bottles). To beat this barrier, well being care professionals may select to prescribe a 30-day nPEP provide with directions to the nPEP person that the course might be thought-about full after 28 days of medicine. When the supply is current throughout a affected person’s nPEP analysis, well being care professionals may assess the supply’s entry to related medical care, behavioral interventions, and social help providers and supply related remedy, referrals, or each, as indicated.

Laboratory Testing and nPEP Observe-Up

At nPEP initiation, laboratory testing is required to exclude pre-existing HIV an infection, acquire baseline renal and liver operate assessments, and consider different situations relying on the circumstances of the publicity to guarantee choice of the most secure, most applicable ARV routine. Laboratory testing is also really helpful on the finish of the course to test for HIV an infection. Suggestions are offered for probably the most applicable assessments and time of testing (Desk 3).

Suggestions for Laboratory Testing and nPEP Observe-Up

• Individuals being assessed resulting from a identified or attainable publicity to HIV ought to be examined for HIV (good observe assertion, current suggestion).
• On the preliminary nPEP medical go to, a fast (additionally known as point-of-care), laboratory-based antigen/antibody mixture (Ag/Ab) HIV check, or each, is really helpful (good observe assertion, current suggestion).
• For individuals with long-acting injectable PrEP ARV publicity in the course of the previous 12 months, a diagnostic HIV nucleic acid check (NAT) is really helpful on the preliminary medical analysis, along with an Ag/Ab HIV check (good observe assertion, oblique information; current suggestion).
• Carry out interim HIV testing with each a laboratory-based HIV Ag/Ab check plus a diagnostic HIV NAT check 4–6 weeks after publicity (good observe assertion, normal of care).
  • º HIV testing 4–6 weeks post-nPEP initiation could also be deferred for individuals who began nPEP inside 24 hours of a identified or attainable HIV publicity and who didn’t miss any nPEP doses.
• Carry out closing HIV assessments utilizing laboratory-based HIV Ag/Ab mixture immunoassay and diagnostic HIV NAT 12 weeks after publicity (good observe assertion, normal of care).
• Routine laboratory testing really helpful for individuals beginning nPEP consists of serum creatinine, alanine aminotransferase (ALT), and aspartate aminotransferase (AST), in addition to HIV, hepatitis B virus (HBV), and being pregnant testing (good observe assertion, current suggestion).
• Testing and remedy of hepatitis C virus (HCV) an infection, different STIs together with gonorrhea, chlamydia, and syphilis, and different medical remedy ought to be tailor-made to the medical state of affairs (good observe assertion, current suggestion).

HIV Testing and nPEP

Laboratory testing is required to 1) doc HIV standing of the particular person looking for an nPEP analysis (and the publicity supply when accessible and consent has been granted), 2) establish and clinically handle every other situations that would outcome from sexual or injection-related publicity to doubtlessly contaminated physique fluids, 3) establish any situations that may have an effect on choice of the nPEP medicine routine, and 4) monitor for security or toxicities associated to the routine prescribed. Sorts of HIV assessments embody nucleic acid assessments (NATs) that detect HIV RNA; antigen/antibody mixture (Ag/Ab) assessments that detect the HIV p24 antigen in addition to HIV immunoglobulin M (IgM) and immunoglobulin G (IgG) antibodies; and antibody (Ab) assessments that detect HIV IgM antibodies, IgG antibodies, or each. Various kinds of HIV assessments have completely different window durations (time between HIV publicity and talent to detect HIV an infection) and completely different sensitivities to detect HIV within the setting of current ARV publicity. Assets can be found to offer further details about HIV testing (28,61).

HIV Testing on the Preliminary Go to

The purpose of HIV testing on the preliminary nPEP encounter is to evaluate whether or not the particular person has HIV with out delaying nPEP initiation. Individuals with a current identified or attainable HIV publicity ought to be examined for HIV utilizing a fast (point-of-care) or laboratory-based Ag/Ab check. If a fast (point-of-care) check is used, then a laboratory-based Ag/Ab check can also be really helpful to extend the sensitivity for detecting HIV (62). Sure specialists would come with an HIV NAT in nPEP baseline testing, particularly if the particular person has not too long ago taken oral ARVs or had a cabotegravir injection in the course of the previous yr (62). The advantages of a diagnostic HIV NAT embody elevated sensitivity (in contrast with Ag/Ab assessments) to detect HIV within the setting of ARV publicity and the shortest time to detection amongst accessible HIV assessments. Potential issues related to a diagnostic HIV NAT embody entry points, notably an absence of availability in sure areas or methods and elevated prices. If the really helpful HIV check shouldn’t be accessible, probably the most delicate accessible check ought to be used. Oral fluid–primarily based fast HIV assessments usually are not really helpful for HIV screening within the context of nPEP providers as a result of they’re much less delicate for the detection of acute or current an infection than blood assessments (62). nPEP providers shouldn’t be withheld due to an absence of availability of HIV NATs (62). nPEP ought to be initiated as quickly as attainable after the fast (point-of-care) check outcome (if accessible). The preliminary nPEP dose shouldn’t be delayed whereas awaiting outcomes of laboratory-based testing.

On the preliminary nPEP go to, well being care professionals ought to inform the particular person being examined for HIV that the outcomes can’t establish HIV acquisition from the current (≤72 hours) publicity. This counseling can reinforce the significance of follow-up HIV testing. Individuals being assessed after a current HIV publicity additionally ought to be educated concerning the indicators and signs related to acute HIV an infection, together with fever, rash, or influenza- or mononucleosis-like signs, and requested to return for analysis if these happen earlier than the ultimate nPEP medical go to (on the time of ultimate follow-up HIV testing 12 weeks after publicity). The preliminary nPEP go to can also be a possibility to evaluate ongoing danger for HIV acquisition and supply schooling about HIV PrEP (5).

Individuals with a optimistic fast (point-of-care) HIV check on the preliminary go to ought to obtain supplemental diagnostic testing as quickly as attainable (61). If HIV an infection is recognized in an individual who’s taking PEP, the PEP routine ought to be continued till they’re evaluated by an HIV remedy specialist. Linkage to HIV remedy ought to happen as quickly as attainable.

Individuals with a current identified or attainable HIV publicity who decline nPEP ought to nonetheless be provided baseline HIV testing and be told that this testing can’t detect HIV acquisition from the current (≤72 hours) publicity. Counseling ought to be supplied concerning the indicators and signs of acute HIV an infection, the elevated danger for HIV transmission throughout acute HIV an infection, and the significance of follow-up testing (63,64). Observe-up HIV testing with a laboratory-based Ag/Ab check is really helpful 6 weeks after publicity for individuals who decline nPEP.

HIV Testing at Observe-up Visits

ARVs taken as PEP and PrEP can suppress HIV viral load, delay seroconversion, and reduce the power to detect HIV an infection. To enhance the probability of diagnosing HIV an infection amongst individuals who’ve not too long ago taken PEP, each a laboratory-based Ag/Ab check and diagnostic NAT are really helpful as follow-up testing (65–67). Incapacity to offer HIV NATs shouldn’t forestall provision of nPEP to individuals with indications. Well being care professionals ought to use probably the most delicate accessible HIV check if the really helpful check shouldn’t be accessible. Oral fluid–primarily based fast HIV assessments usually are not really helpful for HIV screening within the context of nPEP providers as a result of they’re much less delicate for the detection of acute or current an infection than blood assessments (62).

The primary follow-up check with each a laboratory-based Ag/Ab check and a diagnostic NAT might be carried out 4–6 weeks after nPEP initiation (i.e., inside 2 weeks of completion of the complete course of nPEP). Testing right now may establish HIV, notably in individuals who didn’t adhere to the nPEP routine or didn’t full the 28-day course. A adverse check right now doesn’t rule out HIV an infection as a result of ARVs supplied for nPEP may suppress HIV for longer than 2 weeks after stopping the drugs. A follow-up go to with HIV testing 4–6 weeks after PEP initiation can also be an applicable time to evaluate for PrEP indications and to begin PrEP if indicated and desired (5). Though HIV testing 4–6 weeks post-nPEP initiation is preferrable, HIV testing 4–6 weeks post-nPEP initiation might be deferred for individuals who began nPEP inside 24 hours of a identified or attainable HIV publicity, had been adherent to the whole nPEP course, and usually are not contemplating beginning PrEP.

Individuals initiating PrEP earlier than the ultimate follow-up HIV testing 12 weeks after PEP initiation ought to be recommended about the potential of a false-negative HIV check outcome and the significance of ongoing PrEP care with really helpful HIV testing. Accessible information point out that nPEP is very efficient when taken as prescribed, and PrEP pointers don’t suggest a niche between nPEP conclusion and PrEP initiation (5).

The ultimate follow-up check, with the aim of ruling out HIV an infection, ought to embody each a laboratory-based Ag/Ab check and a diagnostic NAT 12 weeks after PEP initiation (8 weeks after PEP completion). This timing is really helpful primarily based on information concerning the timeline for ARV washout and the window interval of the HIV assessments (68,69). Most laboratory-based Ag/Ab assessments ought to be capable to detect HIV acquisition from the preliminary publicity; nevertheless, sure observational research have demonstrated nPEP failures attributable to subsequent exposures (which could not be disclosed) (24). Diagnostic NATs can detect acute HIV an infection roughly 1 week earlier than laboratory-based Ag/Ab assessments, bettering the probability of precisely diagnosing HIV at a time when an individual is very infectious (68). For individuals who haven’t but began PrEP, indications and curiosity in PrEP for HIV ought to be reassessed right now (5).

If 12-week follow-up testing shouldn’t be obtained, then HIV testing ought to be carried out as quickly as attainable and prioritized on the subsequent well being care go to. Screening for PrEP indications and curiosity also needs to be executed right now.

Different Laboratory Research

To information the choice of an applicable ARV routine for nPEP, all sufferers who will likely be prescribed nPEP ought to have serum creatinine measured, an estimated creatinine clearance computed, and serum ALT and AST measured as effectively. HBV testing at nPEP initiation is indicated as a result of tenofovir (each TAF and TDF) and 3TC and FTC are lively towards HBV and abrupt withdrawal of medicines lively towards hepatitis B can result in a hepatitis B flare. Initiation of nPEP shouldn’t be delayed whereas ready for laboratory check outcomes. If wanted, the nPEP routine might be modified after the primary dose as soon as laboratory check outcomes are acquired. Routine follow-up testing of serum creatinine, AST, and ALT shouldn’t be crucial except baseline assessments are irregular or medical indications are current (e.g., indicators and signs regarding for kidney or liver damage). A being pregnant check ought to be executed for all ladies with childbearing potential who’re evaluated for nPEP.

Newer ART regimens have fewer unintended effects and are higher tolerated than earlier regimens (20,70). A number of research help the protection of tenofovir-containing regimens in each individuals with and with out HIV (71–74). Small declines in renal operate may happen with each day tenofovir; nevertheless, these reverse upon cessation and the incidence of great renal occasions may be very low due to PEP’s short-term period. The potential for antagonistic renal occasions is decrease with TAF than with TDF (48). Elevations in liver transaminase stage can happen when taking or after discontinuing ARVs and could be extra frequent in individuals with hepatitis B or hepatitis C. These hepatic unintended effects are much less prevalent with integrase inhibitors than with protease inhibitors (70). Elevations in lipid ranges can happen when taking TAF (75). Nearer monitoring is really helpful if new indicators and signs develop whereas taking nPEP (e.g., rash, jaundice, and muscle ache), if the recipient is pregnant, if there’s a danger for drug–drug interplay, if substantial comorbidities similar to hepatitis or renal dysfunction exist, or if important abnormalities on baseline testing are detected. If muscular soreness develops whereas taking PEP, notably INSTI-based PEP, creatinine kinase ought to be checked. Extra details about laboratory testing within the setting of ARV use is on the market within the “Laboratory Testing” part of the NIH’s Tips for the Use of Antiretroviral Brokers in Adults and Adolescents with HIV (https://clinicalinfo.hiv.gov/en/pointers/hiv-clinical-guidelines-adult-and-adolescent-arv/tests-initial-assessment-follow-up?view=full).

STI Testing, PEP, and Presumptive Remedy

Any sexual publicity that presents a danger for HIV an infection additionally may place an individual in danger for buying different STIs. CDC STI Remedy Tips, 2021, suggest presumptive STI remedy after sexual assault as a result of medical follow-up typically is difficult for survivors (76). Presumptive STI remedy and PEP should be tailor-made to the medical state of affairs and may embody an empiric antimicrobial routine efficient towards chlamydia, gonorrhea, and trichomonas for girls and chlamydia and gonorrhea for males; postexposure hepatitis B vaccination with or with out hepatitis B immunoglobulin (as indicated by the hepatitis B immune standing of the uncovered particular person and the hepatitis B an infection standing of the supply); and human papillomavirus or mpox vaccination (see related pointers for particular indications) (76–78). Sure well being care professionals, in shared decision-making with a sexual assault survivor, may await STI check outcomes slightly than present presumptive STI remedy. If the preliminary STI assessments are adverse and presumptive STI remedy was not supplied, STI testing might be repeated 1–2 weeks after the publicity (76,78). For GBMSM, a single 200 mg dose of doxycycline taken inside 72 hours of condomless intercourse (doxycycline postexposure prophylaxis, or “doxy-PEP”) could be thought-about as a part of a complete strategy to STI care (79). Well being care professionals who present nPEP ought to stay updated with related pointers for STI prognosis and remedy (77–81).

nPEP Observe-Up and Counseling

Observe-up care is critical for sufferers prescribed nPEP drugs to watch for antagonistic results, observe up laboratory testing, help adherence, and optimize HIV prevention methods (e.g., transitioning to PrEP when indicated). Earlier than the particular person leaves the preliminary nPEP encounter, a plan for the really helpful follow-up visits and testing ought to be in place, with applicable referrals and sources supplied. The well being care skilled who supplied or prescribed the nPEP drugs, or a help workers member, ought to observe up with the particular person inside 24 hours to verify entry to the drugs and assess tolerability and adherence. If the particular person doesn’t tolerate the really helpful routine, the well being care skilled ought to take into account switching to another routine to enhance continuation of remedy, and session could be helpful to troubleshoot points with the preliminary routine. Native sources can be found in lots of locations, and nationally the NCCC PEPline (888-448-4911 or https://nccc.ucsf.edu/clinician-consultation/pep-post-exposure-prophylaxis) is on the market.

Well being care professionals offering nPEP providers ought to be conscious that uncommon or extreme toxicities from ARV drugs might be reported to the producer or the FDA (https://www.accessdata.fda.gov/scripts/medwatch/medwatch-online.htm or 1-800-FDA-1088 [1-800-332-1088]). If nPEP is prescribed to a girl who’s pregnant on the time of publicity or turns into pregnant whereas taking nPEP, well being care professionals can contribute medical data into the Antiretroviral Being pregnant Registry (https://www.apregistry.com/).

Scientific issues embody offering counseling to individuals staring nPEP (see Scientific Concerns when Beginning nPEP). Subjects to cowl embody methods to scale back the chance for transmitting HIV if acquired in the course of the nPEP interval (e.g., avoiding condomless intercourse, avoiding sharing drug injection gear, and never donating blood or tissues till the rule standards for donation have been met) (82).

Transitioning to PrEP After PEP

Individuals who obtain nPEP may need persevering with exposures that put them at ongoing danger for buying HIV. These individuals may profit from HIV PrEP to scale back their danger for buying HIV an infection. When taken as prescribed, PrEP can scale back the chance for buying HIV from intercourse by about 99% and from injection drug use by at the very least 74% (20,74,83–88).

Advice for Transitioning to PrEP After PEP

• A right away transition from nPEP to PrEP, together with HIV testing on the completion of the nPEP routine with a immediate transition to a really helpful PrEP routine, could be useful for individuals with anticipated repeat or ongoing potential HIV exposures (good observe assertion, current suggestion).

Rationale for Transitioning to PrEP After PEP

Research that report on HIV incidence after an entire course of nPEP usually are not at all times in a position to decide whether or not seroconversion was due to nPEP failure or subsequent re-exposure. Nevertheless, a number of observational research have reported 0.37%–9% of individuals who’ve taken nPEP acquired HIV an infection after nPEP completion (4,68,69,87–89).

HIV incidence in nPEP customers might be at the very least partially attributed to ongoing publicity danger. In a retrospective cohort examine of nPEP seekers in an outpatient HIV clinic in Poland, 12% (12 of 98) of individuals who took PEP for sexual publicity continued the identical sample of publicity after PEP completion (90). The median time to subsequent publicity was 1.55 (IQR = 0.78–2.43) months with danger for having one other publicity growing with age and for GBMSM (87). In a retrospective information linkage examine of HIV incidence amongst nPEP seekers at a big tertiary care hospital in Switzerland, the HIV incidence fee amongst GBMSM who sought nPEP was 70.5 per 10,000, nearly twice the general incidence amongst GBMSM in Zurich (39 per 10,000). The speed amongst GBMSM with a couple of nPEP course was even increased (81.1). The median time between the final nPEP session and HIV prognosis was 4.1 (IQR = 2.3–6.4) years (88).

All individuals prescribed nPEP ought to be assessed for ongoing danger for HIV acquisition. For individuals who may profit from PrEP, initiation can happen at any time after nPEP completion (89). Accessible information point out that nPEP is very efficient when taken as prescribed and all individuals prescribed nPEP ought to be assessed for ongoing danger for HIV acquisition. Accessible information point out that nPEP is very efficient when taken as prescribed and PrEP pointers don’t suggest a niche between nPEP conclusion and PrEP initiation (89). ARVs can delay HIV prognosis if HIV acquisition occurred in the course of the publicity previous nPEP (5,68). Individuals initiating PrEP earlier than the ultimate follow-up HIV check 12 weeks after PEP initiation ought to be recommended about the potential of a false-negative HIV check outcome and the significance of ongoing PrEP care with really helpful HIV testing. Extra details about HIV testing is on the market (see Laboratory Testing and nPEP Observe-Up). Additional data on transition from nPEP to PrEP is on the market within the “Nonoccupational Postexposure Prophylaxis” part of the latest CDC PrEP Tips (5).