Rio study tests antibiotic after sex to stop STIs
NCT ID NCT07500415
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tests whether taking the antibiotic doxycycline shortly after sex can prevent bacterial STIs like syphilis, gonorrhea, and chlamydia. It involves 200 men, transgender women, and travestis in Rio de Janeiro who are at higher risk. Participants choose whether to use doxy-PEP and are followed for 48 weeks to see if it reduces infections and is safe.
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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
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Phone: •••-•••-•••• Email: •••••@•••••
Locations
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Instituto Nacional de Infectologia Evandro Chagas
RECRUITINGRio de Janeiro, Rio de Janeiro, 21040-360, Brazil
Contact Phone: •••-•••-•••• Email: •••••@•••••
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