Sustained Effectiveness of Doxycycline Post-Exposure-Prophylaxis in a Large Sexual Health Clinic over 96 Weeks: An Interrupted Time Series Analysis.

Spinelli, Matthew A; Heise, Megan J; Roman, Jorge; Bena, Jason; Barry, Michael P; Buchbinder, Susan P; Scott, Hyman M · Clin Infect Dis · 2025

prospective_cohort · Level II

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Abstract

Doxycycline post-exposure prophylaxis (doxy-PEP) reduced bacterial sexually transmitted infection (STI) incidence in a sexual health clinic over 96 weeks (n=4,592; 2,524 on doxy-PEP), particularly for chlamydia and syphilis, with smaller effects for gonorrhea. Continued surveillance for gonorrhea and antibiotic resistance is essential to evaluate doxy-PEP's long-term effectiveness.