Even if your partner is infected, the chance of STD or HIV transmission is low for any particular exposure. And your
azithromycin (Z
pak) treatment would reliably prevent most treatable STDs, including all chlamydia, almost all gonorrhea, and probably all nongonococcal urethritis (NGU). Some syphilis is resistant to azithromycin, but heterosexually transmitted syphilis is rare in this situation.