A client presents to the clinic with intense itching at night and is diagnosed with pinworms. The nurse anticipates the client would be placed on which medication to treat this condition?

A. Ciprofloxacin is an antibiotic used to treat bacterial infections and is not effective against parasitic infections such as pinworms. B. Zidovudine is an antiretroviral medication used primarily for HIV treatment and does not target pinworms. C. Ketoconazole is an antifungal medication that is not indicated for treating pinworm infections. D. Mebendazole is an anthelmintic medication specifically used to treat pinworm infections by inhibiting the metabolism of the parasite, making it the appropriate choice for this client.