An adverse drug reaction is an unwanted or harmful effect caused by a medicine, also called a side effect or adverse reaction. Examples include rash, nausea, headache and drowsiness, and reactions range from mild to serious.
Not all side effects are serious. Problems can also come from allergies, incorrect doses, or interactions with other medicines, food or alcohol. Ask your pharmacist about possible side effects when you start a new medicine, and take it as directed. If side effects are troubling you, talk to your doctor and pharmacist, who may be able suggest another medicine. Never take a medicine prescribed for someone else.
If you think you might be having a serious side effect, see your doctor at once, and in an emergency call triple zero (000) for an ambulance. You, your doctor or your pharmacist can report a suspected reaction to the Therapeutic Goods Administration (TGA), and you do not need to be certain the medicine caused it. Keep the packaging and note when the problem started.
healthdirect, Side effects of medicines (reviewed August 2024)
healthdirect, Reporting a problem with a medicine (reviewed November 2024)
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