HIV Prophylaxis in Sexual Assault 

Updated: Apr 09, 2019
Author: Derek T Larson, DO; Chief Editor: Michael Stuart Bronze, MD 

Overview

Background

Guidelines for HIV postexposure prophylaxis (PEP) in at-risk patients have been issued by the Centers for Disease Control and Prevention (CDC) and Department of Health and Human Services (DHHS). Guidelines pertaining to nonoccupational exposures (including but not limited to sexual assault, high-risk consensual sexual encounters, and injection drug use) are reviewed and summarized below. For information regarding occupational exposures, see HIV Postexposure Prophylaxis, Occupational.

The 2016 CDC Guidelines regarding HIV PEP were reviewed in 2018. Major updates from the 2005 guidelines are as follows:

  • Transition to rapid antigen/antibody HIV tests
  • Revised PEP drug regimens
  • Updated testing schedules for both source and exposed patients
  • Antimicrobial treatment of sexually transmitted infections (STIs)
  • Evaluation for transition to preexposure prophylaxis (PrEP)

In addition, the FDA announced in May 2018 that it was investigating correlations between dolutegravir use in early pregnancy and neural tube defects. Although such a correlation has not been shown definitively, current guidance remains that women who are pregnant or desire to become pregnant should typically avoid dolutegravir and, owing to a lack of safety data, bictegravir. Raltegravir has a well-established safety profile for this use and remains a primary treatment option.[1]

Indications

Exposure types

HIV PEP is indicated in all HIV-negative patients following significant exposure to a substantial-risk bodily fluid, as detailed below. PEP with antiretrovirals in patients who are already HIV-positive is not recommended, although considerations for other treatments (eg, other infections, trauma, legal issues, undesired pregnancy) remain unchanged when the exposed patient is already HIV-positive. If rapid (< 1 hour) determination of the exposed patient’s HIV status cannot be obtained, it is prudent to proceed under the assumption that he or she is HIV-negative. Oral HIV tests are not recommended for use during this evaluation owing to a lack of sensitivity.

Significant exposure

Contact with a substantial-risk fluid to vagina, rectum, eye, mouth, nonintact skin (including dermatitis), or percutaneously is considered a significant exposure.

If the source patient is HIV-negative and not at a significant risk for acute HIV illness, PEP can often be discontinued after testing but should not be delayed while awaiting these tests. If the source’s HIV status is unavailable, a determination of risk must be based on the source’s known risk for acute or chronic HIV infection.

Substantial-risk fluids

Substantial-risk fluids are as follows:

  • Blood
  • Semen
  • Vaginal secretions
  • Rectal secretions
  • Breast milk
  • Any fluid visibly contaminated with blood

Negligible-risk fluids

Negligible-risk fluids (if not visibly blood) are as follows:

  • Urine
  • Tears
  • Saliva
  • Nasal secretions
  • Sweat

HIV PEP timing

Consideration for initiation of PEP is a medical emergency and should begin as soon as possible after exposure. PEP is recommended only in patients who present to care 72 hours or sooner since the last exposure, as the window to prevent HIV integration into host cells is limited. Persons with repeated exposures can be considered for treatment from their last known exposure. The decision to treat those exposed more than 72 hours prior to presentation should be made in conjunction with expert medical advice, but treatment is often not advisable in these situations. For patients who present outside this window, recommendations for testing and other supportive care remain unchanged.

Contraindications

According to the World Health Organization (WHO), PEP is contraindicated if the exposed person is already HIV-positive due to a previous exposure, if the patient is chronically exposed to HIV, if the exposure does not pose a risk of transmission, or if the exposure occurred more than 72 hours previously.[2]

Because nonoccupational postexposure prophylaxis (nPEP) carries a risk for adverse effects and toxicities, it should be used for only infrequent exposures. Persons who engage in behaviors that result in frequent recurrent exposures that would require sequential or near-continuous courses of antiretroviral medications (eg, multiple sex partners who rarely use condoms or injection-drug users who often share injection equipment) should not receive nPEP. In these instances, exposed persons should instead be provided with intensive risk-reduction interventions.[3] In addition, HIV pre-exposure prophylaxis (PrEP) should be discussed to prevent future infection.

Laboratory Testing

Initial testing is focused on determining the exposed patient’s pre-existing burden of illness (HIV, hepatitis B, hepatitis C), as well as acquired infections (gonorrhea, chlamydia, syphilis, if applicable), obtaining pregnancy status (if applicable), and preparing for safe administration of PEP therapy.

HIV testing, as follows:

  • Ag/Ab combination (alternative, Ab only) upon presentation and then at 4-6 weeks and 3 months
  • Testing at 6 months indicated if patient recently infected with hepatitis C

Hepatitis B testing, as follows:

  • Hepatitis B surface antigen (HBsAg) upon presentation and then at 6 months, if susceptible
  • Hepatitis B surface antibody (HBsAb) upon presentation and then at 6 months, if susceptible
  • Hepatitis B core antibody (HBcAb) upon presentation and then at 6 months, if susceptible

Hepatitis C testing: Surface antibody upon presentation and then at 6 months, if susceptible

Other tests, if applicable, as follows:

  • Syphilis serology upon presentation and then at 4-6 weeks and 6 months
  • Gonorrhea (nucleic acid amplification) from all exposed sites (genital, pharyngeal, anal)
  • Chlamydia (nucleic acid amplification) from all exposed sites (genital, pharyngeal, anal)

Baseline laboratory tests for PEP medications, as follows:

  • Urine human chorionic gonadotropin (HCG), if applicable, upon presentation and then at 4-6 weeks
  • Complete blood cell (CBC) count
  • Aspartate transaminase (AST) and alanine transaminase (ALT)

Source testing should include HIV Ab/Ag (and quantitative polymerase chain reaction [PCR], if applicable), hepatitis B, hepatitis C, and STI screening as above.

Individual state laws on source testing have substantial variability, and legal ramifications should be known for each jurisdiction (see http://www.cdc.gov/hiv/policies/law/states/)

Outcomes

Postexposure prophylaxis (PEP) for HIV remains controversial. It is unclear whether PEP is effective in preventing seroconversion after nonoccupational exposure to HIV. Justification of the efficacy, timing, and duration of nPEP has been extrapolated from 4 lines of evidence, as follows:

PEP is not 100% effective. PEP failures are more likely to be associated with zidovudine monotherapy,[2, 16, 17] infections with HIV strains that are resistant to the antiretroviral medications,[18] and ongoing exposures to HIV.[18, 15, 19, 20, 19] In patients who seroconvert despite nPEP, resistance testing should be considered to guide early and subsequent treatment decisions.

Despite this, outcomes are typically good, as per-act risk of HIV acquisition remains low. For reference, a needlestick from an HIV-infected source leads to seroconversion in only 1 of 435 percutaneously exposed healthcare workers, and a single act of receptive penile-vaginal intercourse leads to infection in 1 of 125 instances. Receptive anal intercourse remains a higher risk, at 1 of 73 instances.[21] If the source patient is known to have HIV infection but is virologically controlled on medication, this risk is even further reduced.[22, 23, 24]

Other Sexually Transmitted Diseases

CDC recommendations state that all persons evaluated for possible HIV PEP should be evaluated for other exposures and conditions. These include bacterial STIs, traumatic injuries, hepatitis B and hepatitis C infection, and/or pregnancy. The following should be administered regardless of initial patient testing and whether HIV PEP is administered or not following sexual assault.

Gonorrhea, as follows:

Chlamydia, as follows:

  • Azithromycin 1 gram orally, once OR
  • Doxycycline 100 mg orally, twice daily, for 7 days

Trichomoniasis (females only), as follows:

Human papillomavirus (HPV) infection, as follows:

  • In males aged 9-21 years and females aged 9-26 years, initiate HPV vaccine series (upon presentation and at 1-2 months and 4-6 months)
  • For those 45 years or younger, the FDA has approved use of HPV vaccination, although the CDC guidelines have not yet included this. [25]

Treatment to be administered after bodily fluid exposures (including, but not limited to, sexual encounters) is discussed below.

Hepatitis B, as follows:

  • If patient immunized and documented vaccine responder: No action
  • If patient immunized without documented vaccine response: Booster hepatitis B vaccine dose once
  • If patient non-immunized: Hepatitis B vaccine series (upon presentation and then at 1-2 months and 4-6 months) and hepatitis B immune globulin given once

Hepatitis C: PEP not currently recommended

Preexposure Prophylaxis

The CDC recommends that all persons who report behaviors or situations that place them at risk for frequently recurring HIV exposures (eg, injection drug use, sex without condoms) or who report receipt of one or more courses of nPEP in the preceding year should be provided risk-reduction counseling and intervention services, including consideration of preexposure prophylaxis (PrEP).

Patients who require HIV PEP may often benefit from PrEP, and the evaluation and discussion of preemptive therapy should occur at some point during the initial visit or follow-up appointments. As indications and modalities for PrEP are likely to continue to change, see Preexposure HIV Prophylaxis for a full discussion.

 

Periprocedural Care

Patient Education and Consent

If HIV nPEP is offered, the following information should be discussed with the patient:

  • The unproven benefit and known toxicities of antiretrovirals
  • The importance of close follow-up
  • The importance of adherence to recommended dosing to prevent selection of resistant viruses
  • The necessity of early initiation of PEP to optimize potential benefits (ie, as soon as possible and up to 72 hours after the assault)
  • Cost of the medication regimen

Patients should be informed that various payment methods for nPEP are available for survivors of sexual assault, including Medicaid, Medicare, or Crime Victims Compensation. Third-party reimbursement may cover nPEP, depending on the plan’s prescription drug policy, if the individual has prescription drug coverage. In cases where the medication-dispensing facility does not receive reimbursement for these services, such expenses may be included in their annual Institutional Cost Report as part of indigent care costs.

The Crime Victim’s Board (CVB) has developed special procedures to ensure availability of nPEP for sexual assault victims. Victims of sexual assault may also contact a Rape Crisis Center or Victims Services Agency in their county or region for assistance in filing claims with the CVB, particularly when emergency assistance is needed. Many of these agencies have 24-hour hotlines. For more information about accessing Crime Victims Compensation and for a list of Victims Services Agencies and other resources, consult the CVB website.

For more details on sexual assault in general, see Sexual Assault. For child sexual abuse, see the article Child Sexual Abuse.

Additional resources for HIV/sexual assault include the following:

Centers for Disease Control and Prevention

1600 Clifton Road

Atlanta, Georgia 30333

(404) 639-3311 Public Inquiries (404) 639-3534, (800) 311-3435

www.cdc.gov

 

National HIV/AIDS Hotline

American Social Health Association

P.O. Box 13827

Research Triangle Park, NC 27709

(800) 342 - AIDS

(800) 344 - SIDA (Spanish)

(800) 243 - 7889 (TDD)

They provide HIV/AIDS information 24 hours a day, 7 days a week and will send free written information. They also make referrals to any organization/agency that provides information, including legal services, counseling, and therapies.

 

National AIDS Clearinghouse

P.O. Box 6003

Rockville, MD 20849

(800) 458 - 5231

(800) 243 - 7012 (TDD)

Distributes various educational materials to the public and provides expert referrals.

 

National Center for Victims of Crime

2000 M Street NW, Suite 480

Washington, DC 20036

Phone: (202) 467-8700

Fax: (202) 467-8701

www.ncvc.org

 

National Sexual Violence Resource Center

123 North Enola Drive

Enola, Pennsylvania 17025

877-739-3895 (toll-free)

717-909-0710 (phone)

717-909-0714 (fax)

717-909-0715 (TTY)

www.nsvrc.org

 

Rape, Abuse, and Incest National Network (RAINN) National Sexual Assault Hotline

2000 L Street, NW, Suite 40

Washington, DC 20036

(202) 544-1034

(800) 656-HOPE (4613)

info@rainn.org

www.rainn.org

 

National Native American AIDS Prevention Center

2100 Lakeshore, Suite A

Oakland, CA 94606

(800) 283 - AIDS

(Hours: 8:30am - 1pm; 2pm - 5pm, PST)

National Association of People with AIDS (NAPWA)

1413 K Street, NW

Washington, DC 20005

(202) 898 - 0414

(202) 789 - 2222 (FAX: AIDS information facts on demand)

NAPWA is a nonprofit organization that provides information services, educational resources, national advocacy, and technical assistance for community-based organizations.

Pre-Procedure Planning

Assistance with PEP-related decisions can be obtained by contacting the following:

In New York State: For referrals to HIV specialists, call the AIDS Institute’s Office of the Medical Director: (212) 417-4536 (M-F, 8am-5pm); all other hours, call the HIV/AIDS Hotline: 1-866-881-2809. For NYSDOH protocol for management of sexual assault victims, call the NYSDOH Rape Crisis Program: (518) 474-3664 and/or visit the NYSDOH HIV Guidelines Website.

Follow Up

Patients evaluated for PEP should be educated about the symptoms of acute HIV seroconversion (notably fever, lymphadenopathy, and/or diffuse rash) and instructed to seek medical care if they develop. Follow-up with a primary care provider or infectious disease physician should occur at 4-6 weeks, 3 months, and 6 months regardless of whether PEP was initiated in order to screen for medication side effects, to evaluate for symptoms of seroconversion, and to test for development of infections. If initiated, PEP adherence should be stressed, as overall adherence rates are around 60%.

 

Medication

Medication Summary

HIV PEP Regimens

Although the exact drug regimens for HIV PEP have changed in recent years, consensus remains that the preferred regimen is a 3-drug regimen given over a 28-day course.[21] Anyone prescribed PEP should be given the full 28-day course.

Adults and adolescents

Patients older than 13 years with normal renal function (CrCl ≥60 mL/min), including pregnant women

The preferred 3-drug regimen is as follows:

Caution: Coadministration of raltegravir or dolutegravir with antacids or cations (iron, calcium, or magnesium) can reduce drug absorption and therefore efficacy of PEP.

An alternative regimen is as follows:

  • Tenofovir disoproxil fumarate 300 mg/emtricitabine 200 mg (Truvada) daily AND
  • Darunavir 800 mg daily AND
  • Ritonavir 100 mg daily OR cobicistat 150 mg daily (as pharmacokinetic booster)

Patients older than 13 years with chronic kidney disease (CrCl < 60 mL/min)

The preferred 3-drug regimen is as follows:

  • Renally dose-adjusted zidovudine and lamivudine daily AND
  • Raltegravir 400 mg twice daily OR dolutegravir 50 mg once daily

Caution: Coadministration of raltegravir or dolutegravir with antacids or cations (iron, calcium, or magnesium) can reduce drug absorption and therefore efficacy of PEP.

An alternative regimen is as follows:

  • Renally adjusted zidovudine and lamivudine daily AND
  • Darunavir 800 mg daily AND
  • Ritonavir 100 mg daily OR cobicistat 150 mg daily (as pharmacokinetic booster)

PEP is especially important in pregnant women and should not be avoided because of known or possible pregnancy.

Note that tenofovir alafenamide (TAF), a newer formulation of tenofovir, has not been specifically studied for HIV PEP and is not currently recommended for this indication. A TAF-containing co-formulation with emtricitabine (Descovy) is FDA-approved for the treatment of HIV infection in combination with other active agents, but its ultimate role in HIV PEP remains undefined at the time of this writing.

Infants and children

Children aged 2-12 years

Each drug dosed to age and weight

Preferred 3-drug regimen: Tenofovir DF AND emtricitabine AND raltegravir

Alternative regimens are as follows:

  • Zidovudine AND lamivudine with raltegravir
  • Lopinavir/ritonavir with raltegravir
  • Tenofovir DF AND  emtricitabine AND lopinavir/ritonavir

Children aged 3-12 years: Tenofovir DF AND emtricitabine AND darunavir/ritonavir (darunavir is approved in children aged 3 years or older)

Children aged 4 week to < 2 years

Preferred 3-drug regimen: Zidovudine AND lamivudine with raltegravir or lopinavir/ritonavir

Alternative regimen: Zidovudine AND emtricitabine with raltegravir or lopinavir/ritonavir

Children aged birth to 27 days

Consult a pediatric HIV specialist.

 

Questions & Answers

Overview

What are the guidelines on HIV prophylaxis following sexual assault?

When is HIV postexposure prophylaxis (PEP) indicated?

How is a significant exposure to HIV defined?

What are the substantial risk fluids of HIV exposure?

What are the negligible risk fluids of HIV exposure?

When is HIV postexposure prophylaxis (PEP) administered following a sexual assault?

What are contraindications for HIV postexposure prophylaxis (PEP)?

What is the focus of the initial lab tests prior to HIV postexposure prophylaxis (PEP)?

When is HIV testing performed following a sexual assault?

What is the role of hepatitis B testing in the workup of HIV postexposure prophylaxis (PEP)?

Which STIs tests should be performed in the workup of HIV postexposure prophylaxis (PEP)?

What are the baseline lab tests for HIV postexposure prophylaxis (PEP) medications?

What source testing is performed in the workup of HIV postexposure prophylaxis (PEP)?

What is the efficacy of HIV postexposure prophylaxis (PEP)?

What are the CDC guidelines for the evaluation of STIs following sexual assault?

Which medications are administered to prevent STIs following a sexual assault?

What are the CDC recommendations for preexposure HIV prophylaxis (PrEP)?

Periprocedural Care

What is included in patient education about HIV postexposure prophylaxis (PEP) following a sexual assault?

Where are additional resources for HIV postexposure prophylaxis (PEP) and sexual assault found?

Where can assistance with HIV postexposure prophylaxis (PEP)-related decisions be obtained?

What is included in the long-term monitoring of HIV postexposure prophylaxis (PEP) following a sexual assault?

Medications

What are HIV postexposure prophylaxis (PEP) regimens for children aged 4 week to < 2 years?

What are the HIV postexposure prophylaxis (PEP) regimens?

What are the HIV postexposure prophylaxis (PEP) regimens for patients older than 13 years with normal renal function?

What are the HIV postexposure prophylaxis (PEP) regimens for patients older than 13 years with chronic kidney disease?

What are the HIV postexposure prophylaxis (PEP) regimens during pregnancy?

What are the HIV postexposure prophylaxis (PEP) regimens for children aged 2-12 years?

What are the HIV postexposure prophylaxis (PEP) regimens for children aged birth to 27 days?