An acetazolamide dose is prescribed based on BSA of 0.7 m2. If the total daily dose is 600 mg/m2, what is the mg per dose?

An acetazolamide dose is prescribed based on BSA of 0.7 m2. If the total daily dose is 600 mg/m2, what is the mg per dose?

• A. 120 mg
• B. 140 mg
• C. 160 mg
• D. 180 mg

Answer: (B)

To determine the correct dosage per dose of acetazolamide, first calculate the total daily dose based on the body surface area (BSA). The prescribed total daily dose is 600 mg/m², and the patient's BSA is 0.7 m². To find the total daily dose, you multiply the total daily dose per square meter by the patient's BSA: 600 mg/m² × 0.7 m² = 420 mg per day. Next, the typical practice for dosing involves dividing the total daily dose into multiple doses. In scenarios where a common dosing schedule is used, such as two or three doses per day, the total daily amount can be divided by the number of doses taken throughout the day. With a division yielding a feasible per dose amount, it is necessary to identify a standard regimen. If we assume a standard twice-daily dosing schedule, you would divide the total daily dose by 2: 420 mg per day ÷ 2 doses per day = 210 mg per dose. However, looking at the choices provided, it's more unusual to see 210 mg per dose, leading to a review of dividing by a different number of doses, like three. If we consider three doses in a day:

To determine the correct dosage per dose of acetazolamide, first calculate the total daily dose based on the body surface area (BSA). The prescribed total daily dose is 600 mg/m², and the patient's BSA is 0.7 m².

To find the total daily dose, you multiply the total daily dose per square meter by the patient's BSA:

600 mg/m² × 0.7 m² = 420 mg per day.

Next, the typical practice for dosing involves dividing the total daily dose into multiple doses. In scenarios where a common dosing schedule is used, such as two or three doses per day, the total daily amount can be divided by the number of doses taken throughout the day. With a division yielding a feasible per dose amount, it is necessary to identify a standard regimen.

If we assume a standard twice-daily dosing schedule, you would divide the total daily dose by 2:

420 mg per day ÷ 2 doses per day = 210 mg per dose.

However, looking at the choices provided, it's more unusual to see 210 mg per dose, leading to a review of dividing by a different number of doses, like three. If we consider three doses in a day: