A patient takes Aricept 10 mg per day for Alzheimer's. The supply on hand is Aricept 5 mg tablets. They have 20 tablets left. How many days will the medication last?

A patient takes Aricept 10 mg per day for Alzheimer's. The supply on hand is Aricept 5 mg tablets. They have 20 tablets left. How many days will the medication last?

• A. 5 days
• B. 20 days
• C. 15 days
• D. 10 days

Answer: (D)

Translating a daily dose into tablet count and days of supply. The patient is to take 10 mg of donepezil each day. The available tablets are 5 mg each, so two tablets are needed daily to reach the 10 mg dose (2 × 5 mg = 10 mg). With 20 tablets on hand, and using 2 tablets per day, the supply will last 20 ÷ 2 = 10 days.

Translating a daily dose into tablet count and days of supply.

The patient is to take 10 mg of donepezil each day. The available tablets are 5 mg each, so two tablets are needed daily to reach the 10 mg dose (2 × 5 mg = 10 mg). With 20 tablets on hand, and using 2 tablets per day, the supply will last 20 ÷ 2 = 10 days.