Assertion: estrogen's effect | /r/CapableOf | decrease contraceptive efficacy
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text: 331 332 337 339 354 365 366 367 368 Effects of long-term administration of miconazole nitrate vaginal suppositories in women using NuvaRing not known;309 contraceptive ring efficacy not expected to be affected309 Anti-infective agents Anti-infective agents that alter GI bacterial flora may decrease contraceptive efficacy and increase breakthrough bleedinga