A client who has been taking antibiotics presents to the clinic complaining of white patches on the tongue. The nurse exams the client and believes the client has thrush. What medication will most likely be ordered for this client?

A. Hydroxychloroquine.: Hydroxychloroquine is an antimalarial and anti-inflammatory medication used in conditions such as rheumatoid arthritis and lupus. It has no antifungal properties and would not be effective for treating oral candidiasis (thrush). B. Warfarin.: Warfarin is an anticoagulant used to prevent or treat thromboembolic disorders. It has no role in managing fungal infections and could even pose risks if given unnecessarily, such as increased bleeding tendency. C. Nystatin.: Nystatin is an antifungal medication commonly prescribed for oral candidiasis, especially after prolonged antibiotic use that disrupts normal oral flora. It is typically administered as an oral suspension that the client swishes in the mouth and then swallows to eliminate the fungal overgrowth. D. Ondansetron.: Ondansetron is an antiemetic used to prevent nausea and vomiting associated with chemotherapy, radiation, or surgery. It has no antifungal action and would not address the white oral lesions caused by Candida infection.