Half Life Of A Drug Example at Life

Half Life Of A Drug Example. Half life estimation is especially useful when trying to keep constant levels of medicine in the body or when trying to avoid pharmacological interactions between substances. This depends on how the body processes and gets rid of the drug.

Literally, half of the substance is gone every five years (the half life of this particular substance). This means that a change in the dose will take the best part of a week to take full effect. If the initial plasma level of the drug, given as a single dose, is 1200mg/l, what will its plasma level be after 8 hours?

Half of the amount of time it takes for the body to clear half of the medication from the body. Fraction of unchanged drug that reaches systemic circulation following administration (by any route of administration) Beta half life = tissue / elimination half life. So, in our example , after the second life is over (that's 10 years since each half life is 5 years), there will be $$\frac 1 2$$ of $$ 50\% $$ of the substance left, which, of course is $$ 25 \% $$.