Pharmacodynamics

What is it about?

In continuing the Prescribing Paramedic series, this article explores the nature of drug actions that occur within the body. An understanding of these principles allows the paramedic to make an informed decision on the medicines that may be offered, the likely outcomes and possible risks. Often considered a complex subject, this article aims to present a set of principles that the reader can apply to almost all drugs that one may encounter. Where appropriate, relevant case studies have been included to support theory and provide contextual examples.

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Photo by Terry Vlisidis on Unsplash

Photo by Terry Vlisidis on Unsplash

Why is it important?

Pharmacodynamics helps us to understand the chemical interactions which occur between drugs and receptors. Pharmacodynamics examines the cellular processes which occur and how they might affect the body. The general principles remain consistent throughout: drug binds to receptor which causes an action, prevents an action or a combination of both. A number of general examples which relate to common drug therapy have been included to aid your understanding of the subject. The complexity of these processes should not deter you from having a basic grasp of these principles.

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