<prompt> Pharmacogenetics is associated withindividual variations in drug response due to gene variabilityEnvironmental influenceIndividual variability in oral absorptionDifferent mechanism of actions in different individuals  <response>: The determinants of drug response, viz. transpoers, metabolizing enzymes, ion channels, receptors with their couplers and effectors are controlled genetically The study of the genetic basis for variability in drug response is called Pharmacogenetics. Ref ;KD Tripathi Pharmacology 7th edition page no;65 