First-line treatment for pubic lice (pediculosis pubis) is

First-line treatment for pubic lice (pediculosis pubis) is

• A. Oral metronidazole
• B. Topical steroids
• C. Topical permethrin or pyrethrin
• D. Oral antifungals

Answer: (C)

Pubic lice are treated with a topical pediculicide because you need to kill the lice directly on the hair in the groin area. The first-line options are permethrin 1% cream or pyrethrin-based preparations. These are effective at killing both live lice and, with proper use, their eggs, and they have a favorable safety profile for topical use. Typically, you apply the product to the affected area and wash it off after the recommended time; a second treatment is often given 7–10 days later if nits or live lice persist. Other options listed don’t address the infestation: metronidazole targets protozoa like Trichomonas or anaerobes, not lice; topical steroids reduce itching but don’t eradicate the lice; antifungals treat fungi, not lice. If initial treatment fails, alternatives such as oral agents may be considered, but topical permethrin or pyrethrins remain the first choice.

Pubic lice are treated with a topical pediculicide because you need to kill the lice directly on the hair in the groin area. The first-line options are permethrin 1% cream or pyrethrin-based preparations. These are effective at killing both live lice and, with proper use, their eggs, and they have a favorable safety profile for topical use. Typically, you apply the product to the affected area and wash it off after the recommended time; a second treatment is often given 7–10 days later if nits or live lice persist.

Other options listed don’t address the infestation: metronidazole targets protozoa like Trichomonas or anaerobes, not lice; topical steroids reduce itching but don’t eradicate the lice; antifungals treat fungi, not lice. If initial treatment fails, alternatives such as oral agents may be considered, but topical permethrin or pyrethrins remain the first choice.