The nurse is teaching the student nurse the factors that affect the pharmacodynamics of the drugs they are administering. What is a factor affecting this property of drugs?
A) Immature body systems
B) Weight
C) Body surface
D) Body composition
Ans: A
Although a drug's mechanism of action is the same in any individual, the physiologic immaturity of some body systems in a child can affect a drug's pharmacodynamics (behavior of the medication at the cellular level). The child's age, weight, body surface area, and body composition also can affect the drug's pharmacokinetics (movement of drugs throughout the body via absorption, distribution, metabolism, and excretion).
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