Which regimen is recommended for Trichomoniasis treatment in a single dose?

• A. Rash
• B. Arthritis
• C. Dizziness
• D. Nausea

Answer: (B)

For trichomoniasis, a single-dose approach uses a high one-time dose of a nitroimidazole, typically metronidazole 2 g taken orally (or tinidazole 2 g as an alternative). This regimen is favored because it provides high cure rates while keeping treatment simple and improving adherence.

Metronidazole can cause several side effects. Nausea and dizziness are common, and some people may develop a rash. Joint pain, or arthritis (arthralgia/arthritis), is a known but less common adverse effect of metronidazole therapy. So among the options, arthritis represents a possible adverse effect linked to this treatment, while the others are either more commonly reported but not as distinctive to this regimen, or less specific.