The term used to describe what proportion of a drug reaches the systemic blood circulation and is available to reach the intended site of action is called

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Bioavailability is the term used to describe the proportion of a drug that reaches systemic circulation and is available to reach the intended site of action. A drug's bioavailability is affected by several factors, including formulation and route of administration, among others. Pharmacokinetics pertains to how the body processes a drug, while pharmacodynamics pertains to the drug's effects on the body. Formulation refers to the preparation of a drug, such as the specific combination of ingredients used in a tablet or capsule. Route of administration refers to how a drug is delivered to the body, such as orally, intravenously, or topically.

The Term Used to Describe What Proportion of a Drug