What is doxy-PEP and should swingers take it?
Doxy-PEP is a 200mg dose of doxycycline taken within 72 hours after sex to reduce the risk of bacterial STIs — studies show roughly 88% reduction in chlamydia, 87% in syphilis, and 55% in gonorrhea. CDC guidance updated in 2026 recommends discussion of doxy-PEP for gay and bisexual men and transgender women with a recent bacterial STI history; uptake among other lifestyle subgroups is growing. Doxy-PEP requires a clinician prescription, does not replace condoms or routine testing, and adds antibiotic-resistance considerations to the conversation. Talk to a sexual-health clinician familiar with non-monogamous patients.