The present study focuses on the identification and estimation of drugs in the biological matrix using a sophisticated analytical technique also studying their pharmacokinetic parameters like half-lives and rates of elimination and their metabolites in blood. Imiquimod topical treats external warts around the genital and rectal areas called condyloma acuminatum. A direct relationship exists between the drug concentration at the bio-phase (site of action) and the concentration of the drug in plasma. A typical plasma drug concentration-time curve obtained after a single oral dose of a drug and showing various pharmacokinetic and pharmacodynamic parameters.