A nurse is preparing to administer quinapril 20 mg PO. Available is quinapril 40 mg tablets. How many tablets should the nurse administer? (Round off the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Determine the desired dosage: The nurse needs to administer 20 mg of quinapril. Determine the number of tablets per dose: Each tablet contains 40 mg of quinapril. The nurse needs to administer 20 mg per dose. To find the number of tablets per dose: 40 mg / 1 tablet = 20 mg / x tablets Cross-multiplying gives us: 40x = 20 Dividing both sides by 40, we get: x = 0.5 tablets