Terms Related to Adverse Drug Reactions

Terms that may be included as Adverse Drug Reactions (ADRs) are side effects, drug intolerance, idiosyncratic reactions, toxic reactions, allergic reactions, or hypersensitivity reactions.

Side effects are reactions that are unintended and unwanted but are known pharmacologic effects of the drug and occur with predictable frequency.

Drug intolerance is a mild reaction to a drug that results in little or no change in patient management.

Idiosyncratic reaction is an unexpected response that occurs with usual dose of a drug.Toxic reactionis predictable response that results from greater than recommended drug dosages or drug concentration in the body.

Allergic or hypersensitivity reaction is an unusual sensitivity to a drug of an immunologic nature.