Which medication is indicated for trichomoniasis?

Metronidazole is indicated for trichomoniasis due to its effectiveness against anaerobic bacteria and certain protozoa. Trichomoniasis is a sexually transmitted infection caused by the parasite Trichomonas vaginalis, and metronidazole works by disrupting the DNA of the organism, ultimately leading to its death.

The other medications listed do not have the same spectrum of activity. Ciprofloxacin and levofloxacin are both fluoroquinolone antibiotics primarily used for bacterial infections but are not effective against the protozoan causing trichomoniasis. Amoxicillin is a penicillin-type antibiotic that is primarily used for treating infections caused by susceptible bacteria but is not indicated for parasitic infections like trichomoniasis.

Therefore, metronidazole's mechanism of action and its targeted efficacy against the organism causing trichomoniasis make it the appropriate choice for treatment.