Antibiotic after sex could stop STDs in their tracks
Prevention
Recruiting now
This study tests whether taking the antibiotic doxycycline right after sex can prevent three common sexually transmitted infections (gonorrhea, chlamydia, and syphilis) in men who have sex with men. About 400 participants in Bangkok will take the drug or a placebo for 12 weeks an…
Phase: PHASE4 • Sponsor: Bangrak STIs Center • Aim: Prevention
Last updated May 18, 2026 12:01 UTC