The client receives one dose of 200 mg of a medication. How much drug is in the body at 3 half-lives?

Here’s the step-by-step process: After the first half-life (1 half-life), 50% of the initial drug is left. 200 mg → 100 mg (half is eliminated, 100 mg remains). After the second half-life (2 half-lives), 50% of the remaining drug is eliminated again. 100 mg → 50 mg (half of 100 mg is eliminated, 50 mg remains). After the third half-life (3 half-lives), 50% of the remaining drug is eliminated again. 50 mg → 25 mg (half of 50 mg is eliminated, 25 mg remains).