A physician has ordered 37.5 mg of a particular drug over 15 min. If the drug was available aa 2.5 mg/ml of solution, how many ml would you need to give every 15 seconds?

You would have to give 0.25 mL of the drug every 15 s.

This is a problem in unit conversion.

You have to convert seconds → minutes → milligrams of drug → millilitres of drug

15 s *

1 min

60 s

*

37.5 mg

15 min

*

1 mL

2.5 mg

= 0.25 mL

You would have to give 0.25 mL of the drug every 15 s.