Definition

Definition of dose:- Amount of drug or medicinal preparation to be administered at one time is called dose.



Definition of therapeutic dose:- Dose required to produce the optimal therapeutic effect is called therapeutic dose. 


Definition of maximum dose:- Largest dose of drug that is safe to administration & produces no toxic effects is called maximum dose.



Definition of dosage:- Determination of the amount frequency & number of doses of drug for a patient is called dosage.