Metronidazole vs Secnidazole for Trichomonas Infection

Inclusion Criteria: * Women and men aged 18 years or older of any race/ethnicity will be included in the study. * Participants must have either a positive T. vaginalis rapid antigen test (OSOM), or wet mount microscopy with motile trichomonads, or nucleic acid amplification test (NAAT) urinalysis or Pap smear positive for TV within two weeks of available results (and have not yet been treated) that is confirmed by repeat T. vaginalis NAAT testing at study enrollment, * Willing and able to provide and understand informed consent to comply with the study protocol, * Have a method of contact (either phone, email or social media), * Be willing to be randomized. Exclusion Criteria: * Pregnant/lactating or seeking to be pregnant * Have been treated for with a 5-nitroimidazole (i.e. Metronidazole (MTZ), tinidazole (TDZ), or secnidazole \[SEC\]) in the last 28 days * Used intravaginal boric acid or any other intravaginal treatment for T. vaginalis in the last 14 days * Have a history of a type 1 hypersensitivity reaction to 5-nitroimidazole medications * Are taking phenytoin (Dilantin) and/or warfarin (Coumadin) due to drug-drug interactions with oral MTZ * Use of medications which may alter the metabolism of MTZ including Lithium and barbiturates (amobarbital, butalbital, methohexital, phenobarbital, pentobarbital, primidone, secobarbital) * Have been previously enrolled in the study