adverse reactions
Unwanted bodily responses
Adverse reactions are harmful or unwanted responses to something, especially a medication, vaccine, or medical treatment.
The term is standard in healthcare and pharmaceutical contexts: The drug was pulled after reports of adverse reactions, Patients should report any adverse reactions to their doctor.
Distinguished from side effects, which may be neutral or even beneficial.
- side effectsUnintended treatment consequences
- anaphylaxisSevere systemic allergic reaction
- drug allergyHarmful reaction to medicine
- contraindicationsReasons to avoid treatment
- drug interactionsSubstances altering each other's effects
risk factors · overdose · black box warning · warning label · hypersensitivity · toxicity · stomach upset · rash · skin irritation · nausea · irritants · food intolerance · pharmacokinetics · dosage · withdrawal symptoms · prescription · off-label use · chemical burns
- drug reactionsside effects, drug allergy, anaphylaxis, hypersensitivity, toxicity
- Drug RegulationFDA, DEA, controlled substances, drug scheduling, Schedule II
- Drug Risksside effects, drug interactions, overdose, toxicity, black box warning
- Health Regulationdrug approval, drug safety, medical devices, product recalls, health warnings
- pharmacologypharmacology, drugs, pharmacokinetics, dose, drug
- toxicologytoxicology, poison, toxin, venom, toxicity