PrEP, DoxyPEP and testing for men who hook up with men

If you hook up with men, three tools do most of the work of keeping you healthy: PrEP to prevent HIV, DoxyPEP to cut your chances of the common bacterial STIs, and testing every three to six months to catch what gets through. Add PEP as the emergency backup and a couple of vaccines, and you have the whole kit. For most men in the US, all of it can cost nothing.

None of it replaces talking to a clinician, and nothing here is personal medical advice. Think of it as the cheat sheet that makes that conversation, at a clinic or through a telehealth app, five minutes instead of thirty.

Why it matters more for men who have sex with men

HIV in the US is still concentrated among us. The CDC's latest figures¹ estimate about 31,800 new HIV infections in 2022, down 12% from 2018. Gay, bisexual and other men who have sex with men accounted for 67% of them, about 21,400, and 86% of new diagnoses among all men.

The same CDC page says 87 in every 100 people with HIV knew their status. The 13 who didn't are a big part of why new infections keep happening, and why testing matters even when you feel fine.

What is PrEP and which kind should you take?

PrEP (pre-exposure prophylaxis) is HIV medicine for HIV-negative people. According to HIV.gov², it reduces the risk of getting HIV from sex by about 99% when taken as prescribed. It works much less well if you miss doses, so the right version is the one you'll actually stay on.

Yeztugo is the newest. The FDA approved it in June 2025, and in Gilead's announcement⁴, 99.9% of participants in the trial that included cisgender men and gender-diverse people did not acquire HIV.

How soon does PrEP work?

The CDC³ says daily pills reach maximum protection for receptive anal sex after about 7 days. If you're starting before a trip or a new partner, give it that week. For shots, follow the schedule your provider gives you.

What about taking it only around sex?

You may hear about "2-1-1" or on-demand PrEP: two pills before sex, then one a day for two days after. The CDC notes that evidence supports it for men having anal sex, but it is not FDA-approved, and in the US daily dosing is the only approved schedule for pills. If it suits how you hook up, ask a provider to set it up rather than improvising.

Does PrEP protect against other STIs?

No. PrEP prevents HIV only, and HIV.gov² says so plainly: it does not protect against other sexually transmitted infections. That is why men on PrEP are on the three-month testing schedule, and why DoxyPEP and condoms still have a place. The upside is that the PrEP routine catches things early: regular tests mean an infection that would have gone unnoticed for months gets treated within weeks.

Does insurance cover PrEP?

Usually yes, with no co-pay. HIV.gov says PrEP is a preventive service most insurance plans must cover at no cost to you, including the clinic visits and lab tests that go with it. The rule behind that survived a Supreme Court challenge in June 2025, in Kennedy v. Braidwood Management⁵. No insurance? Manufacturer assistance programs, state PrEP programs and community health centers fill most of the gap.

Getting it has also moved onto your phone. Telehealth services prescribe PrEP online, send you lab orders or home kits, and mail the pills. Grindr said in its third-quarter 2026 shareholder letter⁶ that it had bought PurposeMed, the parent of the PrEP telehealth provider Freddie, and plans to bring PrEP care into the app. If you aren't out and don't want to discuss your sex life with your family doctor, telehealth or a sexual health clinic is the easier route.

What is PEP, and when do you need it?

PEP (post-exposure prophylaxis) is a 28-day course of HIV medicine you take after a possible exposure: a condom broke, you weren't on PrEP, or you were assaulted. According to HIV.gov⁷, it must start within 72 hours, and the sooner the better. Go to an ER, urgent care or sexual health clinic and say "PEP" at the front desk. If you find yourself needing it more than once, that is your sign to start PrEP.

What is DoxyPEP?

DoxyPEP is a single 200 mg dose of the antibiotic doxycycline, taken within 72 hours after sex. In guidelines published in June 2024⁸, the CDC said trials among gay and bisexual men and transgender women found it reduced syphilis and chlamydia by more than 70% and gonorrhea by about half. The CDC recommends that clinicians talk about DoxyPEP with gay and bi men and trans women who have had syphilis, chlamydia or gonorrhea in the past 12 months.

What it doesn't do matters as much:

• It does nothing against HIV, so it is not a substitute for PrEP.
• It does nothing against mpox, herpes or HPV.
• It is weaker against gonorrhea, and doctors are watching for antibiotic resistance.
• It doesn't replace testing. Keep your three-to-six-month schedule.

How often should you get tested?

The CDC's screening guidelines for men who have sex with men⁹ say at least once a year if you're sexually active, and every three to six months if you have several or anonymous partners, take PrEP, or use drugs during sex. If you're hooking up from the apps, assume the three-to-six-month schedule applies to you.

What a full screen includes

• HIV, by blood test.
• Syphilis, by blood test.
• Gonorrhea and chlamydia at every site you use. Urine covers the penis. Bottoming needs a rectal swab; giving oral needs a throat swab. A urine-only test misses both, so ask for "three-site testing." You can usually do the swabs yourself.
• Hepatitis B and C at least once, and vaccines for hepatitis A and B if you haven't had them.

Syphilis is the one to watch. The CDC's provisional 2024 data¹⁰ counted 190,242 cases, down 9% from 2023 after years of steep rises. It is curable with antibiotics and easy to miss: the CDC¹² notes the first sore is usually painless and can sit in the rectum or the mouth, where you won't notice it.

Free HIV self-tests by mail

If you want to test at home between clinic visits, Together TakeMeHome¹¹ mails free HIV self-tests to people in the US who are 17 or older, two per order, one for you and one for a partner or friend. You can order again after 90 days. It notes that people on PrEP should rely on their clinic's lab tests instead, because self-tests are less sensitive to very recent infection.

Where can you get tested for free?

• Clinics near you: the CDC's GetTested¹⁵ finder finds HIV, STI and hepatitis testing near you, and many of the clinics it lists offer free or low-cost testing. Public sexual health clinics are used to men who hook up with men and won't blink at anything you tell them.
• At home: free HIV self-tests through Together TakeMeHome, and paid mail-in kits for the full STI panel from telehealth services and labs.
• Through a PrEP provider: PrEP comes with testing built in, usually every three months, so starting PrEP is also the easiest way to stay on schedule.
• Your regular doctor: fine if you're comfortable being specific. Ask for "three-site testing for gonorrhea and chlamydia, plus HIV and syphilis," or you may only get a urine test.

What a clinic visit is actually like

Expect a few blunt questions: how many partners recently, what kind of sex, condoms or not, PrEP or not. They aren't judging you; the answers decide which tests you need. Swabs for the throat and rectum are usually self-collected in a private room and take seconds. Blood comes from one draw. Results for most tests come back by text, app or phone within a few days to a week, and if anything is positive, the clinic will usually treat it there or tell you exactly where to go.

If a test comes back positive

Gonorrhea, chlamydia and syphilis are cured with antibiotics. Tell the men you've been with recently so they can test too; ask the clinic for help with that if you'd rather not send the messages yourself. A positive HIV result is serious but very treatable: HIV.gov advises starting treatment as soon as possible, even the same day, and once your viral load is undetectable you don't pass HIV on through sex. HIV.gov's treatment overview¹⁶ explains what happens next.

Which vaccines should you have?

• HPV: recommended for all men through age 26 under the same guidelines.
• Mpox: the two-dose JYNNEOS vaccine. The CDC¹³ recommends it for gay and bi men and others at risk. If you had only one dose in 2022, get the second.
• Hepatitis A and B: the CDC's guidelines recommend both vaccines for all men who have sex with men who can't show a past infection or vaccination. Ask at your next test.

How do you bring it up with a hookup?

Plainly, and before you meet if you can. "On PrEP? When were you last tested?" is an ordinary question on the apps, and many profiles answer it already. If he tells you he's positive and undetectable, that is good news, not a red flag: people with HIV who keep an undetectable viral load on treatment don't pass it on through sex, which is the message of the Prevention Access Campaign¹⁴'s U=U.

Our hookup etiquette guide covers how to ask without killing the mood, and our first-time guide covers condoms and lube. For a deeper look at each prevention option, our sister site MeetGays.now (ours) has a full PrEP and testing guide.