The Efficacy of Doxycycline Post Exposure Prophylaxis for Preventing STIs Among MSM in Bangkok, Thailand.

The objective of this research is to evaluate the efficacy and safety of doxycycline in MSM for preventing sexually transmitted infections (gonorrhea, chlamydia, and syphilis) in Thailand Participation in this study will last approximately 12 weeks and will include 2-3 clinic visits, along with 10-11 follow-up phone contacts over a period of 11 weeks.

NCT Number	NCT07397403
Lead Sponsor	Bangrak STIs Center Collaborators: Mahidol University
Conditions	Syphilis Infection, Gonorrhea, Chlamydia
Enrollment	400 participants
Start Date	2025-10-06
Primary Completion	2026-10-05 (estimated)
Study Completion	2027-05-31 (estimated)
Updated on ClinicalTrials.gov	2026-02-09