Answer:
The concentration of the drug in bloodstream is maximum immediately after injection.
Step-by-step explanation:
The concentration of drug in a patient's bloodstream is modeled as an exponential function,
[tex]C(t) = C_{0}e^{-rt}[/tex]
where
C(t) is the concentration of drug at ant time t,
C₀ is the concentration immediately after injection,
r is a rate constant, which indicates the removal of drug from body through metabolism.
We see that, the C(t) is maximum when t=0, i.e, immediately after the drug is injected.