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A physician orders phenobarbital 120 mg three times a day for a patient with seizures. 60 mg tablets are available. How many tablets are needed for a one-month supply?

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Answer:

180 tabs in a one-month (30-day) supply

Step-by-step explanation:

120 mg q 3x daily equals 360 mg per day

If they come in 60 mg tablets, then 360 / 60 = 6, the patient will take 6 tabs daily.

If there are 30 days in a month, then 30 x 6 = 180, 180 tablets are needed for the one-month supply.
For months with 31 days, you will need 186 tabs. For the month of February with 28 days, 168. If it's a leap year and the month of February has 29 days, 174.

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