<prompt> Time required to reach the steady state after a dosage regimen depends on:Route of administrationHalf life of a drugDosage intervalDose of drug  <response>: Ans. B Half life of a drugRef: KDT 8the p40-41 After a dosage regimen, concentration of the drug to reach the steady state when the elimination balances the input is called steady state plasma concentration Cpss. Cpss is reached in about 4-5 half lives. The amplitude of fluctuations in Cpss depends on the dose interval relative to t12 . 