The CDC recommends providers counsel gay, bisexual, MSM, and transgender women about using doxycycline for post-exposure prophylaxis (doxy-PEP) to prevent sexually transmitted infections (STIs). This recommendation is based on evidence showing the effectiveness of doxy-PEP in reducing the risk of acquiring chlamydia and syphilis. The CDC advises offering doxy-PEP to patients with a history of STIs within the past 12 months and assessing the ongoing need for the medication every 3 to 6 months. While the evidence supports its use in certain populations, recommendations for other groups are not provided due to insufficient data. The guidelines will be updated as more data becomes available.
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