Doxy-PEP for Straight People: Can You Get It?
Yes, doctors can prescribe doxy-PEP to anyone — but the CDC only formally recommends it for specific groups. Here’s what you need to know.
The bottom line
- Doxy-PEP is 200mg of doxycycline taken within 72 hours of condomless sex. It reduces chlamydia and syphilis risk by about 65%.
- CDC recommends it for MSM and transgender women with a recent bacterial STI. They do not recommend it for cisgender women or heterosexual men — because the trials haven’t proven it works for those groups yet.
- “Not recommended” is not the same as “not allowed.” Any doctor can prescribe doxycycline off-label to any patient based on clinical judgment.
- Cost: about $35 for a telehealth consult + $4–15 for the generic doxycycline at a pharmacy.
What is doxy-PEP?
Doxy-PEP stands for doxycycline post-exposure prophylaxis. It’s a single 200mg dose of doxycycline (a common antibiotic) taken within 72 hours after condomless sex.
The landmark DoxyPEP trial, published in the New England Journal of Medicine in 2023, showed it reduced new chlamydia infections by 88%, gonorrhea by 55%, and syphilis by 87% in MSM and transgender women who were already on PrEP or living with HIV.
Source: CDC MMWR, June 2024
What does the CDC actually say?
In June 2024, the CDC published official guidelines recommending doxy-PEP for:
- 1.Gay, bisexual, and other men who have sex with men (MSM) who have had a bacterial STI (chlamydia, gonorrhea, or syphilis) in the past 12 months
- 2.Transgender women who have had a bacterial STI in the past 12 months
For everyone else — cisgender heterosexual men, cisgender women, transgender men — the CDC says there is “insufficient evidence” to make a recommendation either way.
This is an important distinction. The CDC didn’t say “don’t take it.” They said “we don’t have enough data to recommend it.”
Why not straight people?
The DoxyPEP trial that proved it works enrolled MSM and transgender women. There was a separate trial among cisgender women in Kenya (the dPEP trial), but it did not show a statistically significant reduction in STIs.
Researchers believe the difference might be biological (doxycycline may concentrate differently in vaginal vs. rectal tissue), behavioral, or simply that the Kenya trial was underpowered (too few participants to detect a real effect).
For cisgender heterosexual men, there are simply no completed trials. Nobody has studied it in this group, so the CDC can’t recommend it. That doesn’t mean it doesn’t work — it means nobody has formally tested it.
Can your doctor still prescribe it?
Yes. Doxycycline is a widely available generic antibiotic. It is not a controlled substance. Any licensed physician, nurse practitioner, or physician assistant can prescribe it off-label for any indication they deem clinically appropriate.
“Off-label” means using a medication for a purpose other than what it was specifically FDA-approved for. This is extremely common in medicine — an estimated 20% of all prescriptions in the US are off-label.
California’s Department of Public Health has actually gone further than the CDC, recommending providers offer doxy-PEP using “shared decision-making” to all individuals at higher risk for bacterial STIs — and to anyone who requests it, even without a previous STI diagnosis.
How to get doxy-PEP
You have a few options:
Telehealth (fastest)
Providers like Wisp and CallOnDoc prescribe doxy-PEP via async consultations. You fill out a questionnaire, a clinician reviews it, and sends the prescription to your pharmacy. Total cost: ~$35 consult + $4–15 doxycycline. Same day.
Your primary care doctor
Ask directly: “I’d like a prescription for doxycycline to use as post-exposure prophylaxis for bacterial STIs.” Most doctors are familiar with doxy-PEP by now, especially in urban areas.
Sexual health clinics
SF City Clinic, LA County DPH clinics, Planned Parenthood, and LGBTQ+ health centers prescribe doxy-PEP. Some provide it free or at very low cost.
What doxy-PEP does NOT prevent
Doxy-PEP reduces the risk of bacterial STIs (chlamydia, syphilis, and to a lesser extent gonorrhea). It does not prevent:
- ✕ HIV
- ✕ Herpes (HSV)
- ✕ HPV
- ✕ Hepatitis B or C
- ✕ Trichomoniasis
- ✕ Pregnancy
This is why we recommend combining doxy-PEP with STI testing. Doxy-PEP handles some of the bacterial risk; testing catches everything else.
Concerns about antibiotic resistance
This is the main concern from the public health community. Widespread use of doxycycline could accelerate antibiotic resistance, making future infections harder to treat.
The DoxyPEP trial data showed some increase in tetracycline-resistant bacteria among doxy-PEP users, but no increase in resistance to the antibiotics actually used to treat gonorrhea (ceftriaxone) or chlamydia (azithromycin or doxycycline itself).
The CDC weighed this risk against the benefit of preventing STIs and still recommended doxy-PEP for the populations where efficacy was demonstrated. This is an evolving area of research.
What we recommend
If you’re straight and interested in doxy-PEP:
- 1.Talk to a provider. You can ask your doctor or use a telehealth service. Be direct: “I want doxycycline for STI post-exposure prophylaxis.”
- 2.Understand the evidence gap. The trial data is strong for MSM. For cis women, it didn’t work in one trial. For straight men, it hasn’t been tested. You’re making an informed decision with incomplete information.
- 3.Don’t skip testing. Doxy-PEP reduces risk, it doesn’t eliminate it. And it does nothing for HIV, herpes, or hepatitis. Get tested regularly.
Need to get tested too?
Doxy-PEP handles some of the risk. Testing catches everything else. We’ll find the cheapest option near you — including free ones.
Find testing optionsSources
- CDC MMWR: Doxycycline Post-Exposure Prophylaxis for Prevention of Sexually Transmitted Infections (June 2024)
- Luetkemeyer AF et al. Postexposure Doxycycline to Prevent Bacterial Sexually Transmitted Infections. NEJM (2023)
- California CDPH: Doxy-PEP Statewide Recommendation
- CDC: Doxy-PEP for STI Prevention