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

A) zidovudine (Retrovir): Zidovudine is an antiretroviral medication used primarily to treat HIV infections by inhibiting the replication of the HIV virus. It is not effective for treating parasitic infections such as pinworms. Therefore, zidovudine is not an appropriate medication for treating pinworm infestations, which require anthelmintic therapy. B) ketoconazole (Nizoral): Ketoconazole is an antifungal medication used to treat fungal infections, such as those caused by dermatophytes or yeast. While it is effective against fungal pathogens, it does not have activity against parasitic infections like pinworms. It would not be used to treat an intestinal worm infection such as the one caused by pinworms (Enterobius vermicularis). C) metronidazole (Flagyl): Metronidazole is an antibiotic and antiprotozoal medication commonly used to treat infections caused by anaerobic bacteria and protozoa, such as Giardia lamblia or Trichomonas vaginalis. However, it is not effective against the nematode infection caused by pinworms. Although metronidazole is used for some parasitic infections, it is not the drug of choice for treating pinworm infestations. D) mebendazole (Vermox): Mebendazole is an anthelmintic (anti-worm) medication specifically used to treat infections caused by intestinal worms, including pinworms (Enterobius vermicularis). Mebendazole works by inhibiting the ability of the worm to absorb glucose, thereby starving and killing the parasite. It is one of the first-line treatments for pinworm infections and is commonly prescribed in cases of intense itching, particularly at night, which is a hallmark symptom of pinworm infestations.