Question

if digoxin has a half-life of 35 hours, how long will it take for a toxic plasma concentration of 8ng/ml to decline to a therapeutic asthma concentration of 2ng/ml?

Answer 1

70 hours

Step-by-step explanation:

8 ng/ml to 4ng/ml: 1 half-life

4ng/ml to 2ng/ml: 1 half-life

=> 8 to 2: 2 half-lives

35 hrs x 2 = 70 hrs