Preventing Sexually Transmitted Infections (STIs) after Unprotected Sex In four clinical trials, doxycycline, a decades-old antibiotic, has been showing promise in protecting men who have sex with men and transgender women from contracting chlamydia, gonorrhea and syphylis after condomless sex
Preventing STIs with Doxy PEP | STI | CDC Take 200 mg of doxycycline as soon as possible, within 72 hours, after anal, oral, or vaginal front-hole sex Don't take more than one dose of doxy in a 24-hour period, regardless of how many times you have sex in a day You can take doxy PEP as often as every day if you need
Doxycycline for STDs: Effectiveness, Dosage and Side Effects Doxycycline is an antibiotic that can be taken within 72 hours of unprotected sex to help prevent common bacterial STDs (sexually transmitted diseases) When doxycycline is used in this way it is called Doxy PEP (postexposure prophylaxis)
Is it safe to have unprotected sex while taking antibiotics? For these infections, you should not have sex — unprotected or safe — until seven days after finishing the cycle of antibiotics prescribed, and until your partner has been treated and symptoms are gone