An adverse drug reaction (abbreviated ADR) is a term to describe the unwanted, negative consequences sometimes associated with the use of medications. ADR is a particular type of adverse effect. The term is preferred over the colloquial and imprecise "side effect", as the term "side effect" implies the potential for beneficial consequences and that the effects are not explained by the pharmacological actions of the drug.

While ADR is probably the most precise term to describe the concept, it is not widely used in the community since it may be perceived as jargon and because of the negative-associations with the term "drug". Alternative terms with equivalent meaning to ADR include: side effect, adverse event, adverse effect, etc.

There are many types of ADRs:

• Type A, pharmacologically predictable
• Type B, bizarre and unpredictable
• Type C, arising from chronic use
• Type D, delayed reaction
• Type E, end of dose reaction
• Type F, Failure of therapy

See also

• Adverse effect (medicine) parent concept
• Contraindication
• Drug interaction
• Evidence-based medicine
• Food and Drug Administration
• Iatrogenesis
• Medical algorithm
• Medical prescription
• Nocebo
• Patient safety
• Paradoxical reaction
• Placebo (origins of technical term)
• Polypharmacy
• Responsible drug use
• Toxicology
• Drug intolerance

External link

• Searchable ADR Database

Pharmacy | Pharmacology

药物不良反应