The antidepressant fluoxetine (or prozac) has a half-life of about 3 days. what percentage of a dose remains in the body after one day? what percentage of a dose remains in the body 9 after days?

after 1 day percentage of dose is 79.37 %

after 9 days is 12.50 %

Step-by-step explanation:

given data

half-life =  3 days

to find out

What percentage of a dose remains in the body after one day and after 9 days

solution

we know the half lie Prozac formula that is

so as half life time 3 days

so

take ln both side

k = 0.231

so it become formula

=  

now after 1 day percentage of dose is

 =   = 0.7937 = 79.37 %

and after 9 days

=   = 0.1250 = 12.50 %