A solution contains 100mg/mL of a drug, and the recomended dose is 50 mg/lb once a day.?

Question

How much solution would be needed for one dose to be administered to a 20 kg patient?

If it's possible can u show me how did u do this problem.

P.S. And please save your comments about how I'm trying to get people to do my h/w b/c I am trying hard to understand this math. thx.

Answer 1

Convert 20 kg to lbs (2.2 lb per kg)  so the patient is 44 lbs.

the drug should be given at 50mg per lb so:

50 mg/lb * 44lb = 2200mg should be given

The solution is 100 mg/ml so:

2200mg/100mg/ml = 22ml of solution

Answer 2

(50 mg/ 1 lb) * (2.2 lb/1 kg) * 20 kg = mg needed

100 mg/mL / previous answer = number of mL needed