Can a common antibiotic prevent STIs? new study tests two dosing strategies
NCT ID NCT06188442
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tests whether taking doxycycline before potential exposure to STIs works better than taking it after exposure. 300 men who have sex with men will be randomly assigned to one of two groups and followed for 2 years. The goal is to see which approach better prevents chlamydia, gonorrhea, and syphilis, and whether both are safe and acceptable.
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This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Locations
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Stanley Ho Centre for Emerging Infectious Diseases
Shatin, Hong Kong