A sulfonamide is prescribed for a client with a urinary tract infection. During review of the client’s record, the nurse notes that the client is taking warfarin sodium daily. Which prescription...

A sulfonamide is prescribed for a client with a urinary tract infection. During review of the client’s record, the nurse notes that the client is taking warfarin sodium daily. Which prescription should the nurse anticipate for this client?

1. Discontinuation of warfarin sodium 2. A decrease in the warfarin sodium dosage 3. An increase in the warfarin sodium dosage 4. A decrease in the usual dose of the sulfonamide