What is the appropriate acute management and follow‑up care for a patient presenting within 24–72 hours after a sexual assault?

Acute Management of Sexual Assault (24-72 Hours Post-Assault)

Immediately offer empirical antibiotic prophylaxis for chlamydia, gonorrhea, and trichomoniasis, emergency contraception within 120 hours, and HIV post-exposure prophylaxis (PEP) within 72 hours if risk factors are present—these interventions directly prevent pregnancy and life-threatening infections that impact mortality and quality of life. 1, 2

Immediate Medical Interventions

STI Prophylaxis (Empirical Treatment)

• Provide empirical antibiotics for chlamydia, gonorrhea, and trichomoniasis without waiting for test results 1
• Use metronidazole or tinidazole for trichomoniasis if alcohol was ingested or emergency contraception is being given (minimizes drug interactions and GI side effects) 1
• Consider local antibiotic resistance patterns when selecting agents 3
• 15% of sexual assault survivors will acquire an STI, making prophylaxis critical 4

Emergency Contraception

• Offer within 120 hours of assault to all females with vaginal penetration or genital contact with ejaculate 1
• Perform baseline urine pregnancy test 1
• Discuss failure risks and pregnancy management options 1

HIV Post-Exposure Prophylaxis (PEP)

Initiate within 72 hours when these high-risk factors are present 1, 2:

• HIV-positive perpetrator(s)
• Multiple perpetrators
• Chronic sexual abuse
• High HIV prevalence geographic area
• Perpetrator with genital lesions

PEP Protocol 1:

• Assess HIV risk in assailant and transmission characteristics
• Consult HIV specialist
• Perform baseline CBC, chemistry panel, and HIV testing
• Discuss toxicity risks and lack of proven benefit
• Provide 3-7 days medication initially until tolerance assessment

Critical caveat: Only 3-76% of survivors complete nPEP, and only 12-20% return for follow-up HIV testing 2. Provide written instructions since patients often don't recall verbal information 1.

Vaccination

• Hepatitis B vaccine if not previously immunized 1
• HPV vaccine (initiate or continue series for ages 9+) 1

Specimen Collection Strategy

Use nucleic acid amplification tests (NAATs) with urine or vaginal specimens rather than speculum examination 1:

• Speculum exams may be traumatic, especially for adolescents without prior gynecologic exams
• Can lead to future avoidance of reproductive healthcare
• Vaginal NAAT preferred for trichomoniasis
• Males: urine NAAT plus testing at penetration sites (anus if indicated)

Important consideration: Obtain adolescent consent for STI testing. Positive results may reflect pre-existing infection from prior consensual contact, not necessarily the assault 1. All 50 states prohibit using victim's sexual history against them legally 1.

Mental Health Assessment

Immediately evaluate for suicidal or homicidal ideation in conjunction with mental health professionals 1. Sexual assault survivors have increased risk of depression, PTSD, and suicidality 5.

Follow-Up Care Structure

1-2 Week Visit 1:

• Assess injury healing
• Evaluate medication adherence
• Screen mental health functioning
• Arrange psychological counseling referrals
• Reassess safety

Extended Monitoring (Up to 6 Months) 4:

• Repeat STI testing at 2 weeks if symptomatic 3
• HIV testing follow-up
• Pregnancy testing if indicated
• Ongoing mental health support

Common pitfall: Emergency department patients often don't return for follow-up 1. Secure adolescent consent before communicating with primary care provider (HIPAA permits but state confidentiality laws and ethics require consent) 1. Provide written discharge instructions 1.

Forensic Considerations

If forensic examination hasn't occurred, refer immediately to sexual assault forensic examiner or emergency department 2. Instruct patient to avoid (if possible before exam):

• Changing clothes
• Bathing/showering
• Eating/drinking
• Urinating/defecating
• Douching

However, if these activities already occurred, still perform forensic examination 2.

Documentation and Reporting

• No legal complaint or police report required to provide healthcare 6
• Inform patients of their right to report at any time 6
• Use standardized documentation (e.g., J88 form where applicable) 7
• Healthcare has no barriers—services must be continuously available 6

The evidence strongly supports this aggressive prophylactic approach because the 5% pregnancy rate and 15% STI acquisition rate represent preventable morbidity 1, 4. The 72-hour window for HIV PEP is non-negotiable for high-risk exposures, as this directly impacts mortality 2.