and prevent conditions. clinical pharmacology is concerned with all aspects of drug human interactions. drug efficacy measures the extent to which a given drug causes an intended effect. pharmacokinetics is the study of the impact of the body on a drug. pts: 1 dif: cognitive level: comprehension ref: p. 1 top: nursing process: implementation msc: nclex client needs category: physiologic integrity: pharmacologic and parenteral therapies 2. what is a desired outcome when a drug is described as easy to administer