Drug

Definition

A drug is a chemical substance used to diagnose, treat, cure, or prevent disease. It can also affect the structure or function of the body.

5 Must Know Facts For Your Next Test

1. Drugs can be classified into various categories such as prescription drugs, over-the-counter drugs, and controlled substances.
2. The pharmacokinetics of a drug involves its absorption, distribution, metabolism, and excretion (ADME).
3. Nurses play a crucial role in administering drugs safely and monitoring their effects on patients.
4. Understanding drug interactions is vital for preventing adverse effects and ensuring therapeutic efficacy.
5. The FDA regulates the approval and marketing of drugs in the United States.

Review Questions

• What are the four main processes involved in the pharmacokinetics of a drug?
• Why is it important for nurses to understand drug interactions?
• Which organization is responsible for regulating the approval and marketing of drugs in the United States?

Related terms

Pharmacodynamics:

The study of how drugs affect the body.

Therapeutic Index:

A ratio that compares the toxic dose to the therapeutic dose of a drug.

Adverse Drug Reaction: An unwanted or harmful reaction experienced following the administration of a drug.