Wait until you and all recent partners have finished treatment and any clinician-given wait period has passed. For a single-dose treatment that usually means abstaining for about seven days after the dose CDC, 2021. Some infections also need a follow-up test before sex is safe, so the timing depends on which STD you had.
antibiotics clear them
medicine controls, doesn't cure
| Item | Value |
|---|---|
| Bacterial & parasitic (chlamydia, gonorrhea, syphilis, trich) | curable — antibiotics clear them |
| Viral (herpes, HIV, hepatitis B, HPV) | managed — medicine controls, doesn't cure |
The essentials: when it's safe to have sex again
The wait isn't about you feeling better. It's about making sure the medicine has cleared the infection and that you won't pass it back and forth with a partner. Most people notice symptoms easing within a few days of starting treatment, but feeling better doesn't mean you're cured. The drug needs time to finish, and an untreated partner can re-infect you the moment you stop being careful.
Two rules cover almost every situation. Both you and your partners must complete treatment. And if you were treated with a single dose, abstain for about a week afterward so the medicine fully works. If your clinician ordered a follow-up test (a "test-of-cure" or a later retest), wait for that result.
How it works: cure versus control
Whether an STI can be cured at all depends on what causes it. Bacterial and parasitic infections like chlamydia, gonorrhea, syphilis, and trichomoniasis are curable with antibiotics. Viral infections like herpes, HIV, hepatitis B, and HPV can be controlled with medicine but not cured, so there's no single "all clear" date the way there is with a bacterial infection.
That distinction matters for timing. With a curable infection, the wait period ends once the medicine has cleared the organism. With a viral infection, the question shifts from "when am I cured" to "how do I lower the chance of passing it on," which means suppressive medication, condoms, and disclosure rather than a countdown clock. For example, in pregnancy a clinician may prescribe antiviral therapy to lower herpes transmission risk during delivery; you can read more about whether is valtrex treatment effective in reducing hsv-2 transmission to infant during birth?.
Antibiotics only work against bacteria. Taking them for a virus like herpes or HIV does nothing for the infection and contributes to antibiotic resistance. With gonorrhea that's a real concern, since it has grown resistant to nearly every antibiotic once used against it. The ceftriaxone injection is now the only recommended treatment, and taking the right drug at the right dose keeps it treatable CDC, drug-resistant gonorrhea.
Practical details: what treatment is actually like
For most curable STIs, treatment is either a short course of pills or a single shot. It's often free or low-cost at a health department or Planned Parenthood. In many states your partners can be treated without their own clinic visit through expedited partner therapy, where your clinician sends medication home for them so they don't re-infect you.
A few medication-specific things to expect:
- Doxycycline, used for chlamydia and some other infections, can cause stomach upset and sun sensitivity. Take it with food and stay out of strong sun while you're on it.
- Metronidazole and tinidazole, used for trichomoniasis and bacterial vaginosis, react badly with alcohol; skip drinking during treatment and for a short time after you finish CDC trichomoniasis treatment.
- The gonorrhea ceftriaxone injection's main side effect is soreness at the injection site, which fades within a day or two.
Two mistakes undo good treatment: stopping early because you feel better, and skipping partner treatment. Either one lets an infection quietly persist or bounce straight back. Finish every pill even after symptoms vanish, and make sure recent partners get treated before you resume sex with them.
There's no over-the-counter product or home remedy that cures a bacterial or viral STI. Yogurt, garlic, douching, and "detoxes" don't work. You need the specific prescription medicine and a real diagnosis. If you haven't confirmed what you have, get tested before assuming any treatment is the right one.
What this doesn't cover
This is a timing guide, not a full treatment manual. Exact drug regimens, doses, and side-effect details for each infection belong on their own condition pages, and your prescriber's instructions always override a general rule. If you were exposed recently and are deciding whether to test now or wait, see when to test after exposure. Testing too early can miss an infection that treatment timing then can't fix.
When to see a clinician
Get back in touch with your clinician if symptoms don't improve within a few days, if they return after treatment, or if you can't reach your partners to get them treated. Some infections, syphilis in particular, need follow-up bloodwork weeks to months later to confirm the treatment worked, so keep that appointment even if you feel completely fine. If you're pregnant, on other medications, or had a severe reaction to a drug, call rather than wait.