Marijuana Stays in your system for 31 days.cocaine however will only be about a week.barbiturates will only stay 1 day, where as opiates stay about a week, except they take 1-3 days to appear on a...
It really depends on the specific prescription the patient is taking.On average most medicine stays in the body's system from 7-9 hours.Some can even last the day after you take the prescription.