NAPLEX (North American Pharmacist Licensure Examination) Practice Exam

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Ace your North American Pharmacist Licensure Examination (NAPLEX) with our comprehensive practice test. Features include interactive flashcards, multiple-choice questions, with detailed hints and explanations. Fast-track your pharmacy career today!

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Which drug discolors the skin to a red-orange color?

Entacapone
Methyldopa
Rifampin
Phenazopyridine

The correct answer is: Phenazopyridine

Phenazopyridine is the correct answer because it is known to discolor the skin to a red-orange color. This drug is commonly used to relieve the pain and discomfort associated with urinary tract infections. Phenazopyridine can cause a harmless, but noticeable, side effect of urine and skin discoloration to a red-orange color, which is a result of the drug's metabolites being excreted. The other options are not correct because they do not typically cause skin discoloration to a red-orange color. Entacapone is used in the treatment of Parkinson's disease, Methyldopa is an antihypertensive medication, and Rifampin is an antibiotic commonly used to treat tuberculosis and other bacterial infections.