How many chloramphenicol capsules, each containing 250 mg of chloramphenicol are needed to provide 50 mg/kg body weight per day for 1 week for a person weighing 150 lbs.

Answer 1

Use dimensional analysis and the conversion factor of 1 kg = 2.2 lbs.

150 lb x 1 kg / 2.2 lb x 50 mg / kg-day x 7 day / week x 1 capsule / 250 mg = 95.45 capsules

So, ANSWER = 96 CAPSULES

Done out the long way, we have...

150 lb x 1 kg / 2.2 lb = 68.18 kg

68.18 kg x 50 mg chloramphenicol / kg = 3409 mg x 7 days = 23863 mg chloramphenicol

23863 mg x 1 capsule / 250 mg = 95.45 capsules = 96 capsules