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Table 1 Classification of adverse drug reactions [1, 4, 5]

From: Drug allergy

Type A: predictable

Type B: unpredictable

•Drug overdose

•Secondary drug effects

•Side effects

•Drug interactions

•Drug allergy: an immunologically mediated ADR

•Pseudoallergic (non-allergic): a reaction with the same clinical manifestations as an allergic reaction, but that lacks immunological specificity

•Drug intolerance: an undesirable pharmacologic effect that occurs at low and sometimes sub-therapeutic doses of the drug that are not caused by underlying abnormalities of metabolism or drug excretion

•Drug idiosyncrasy: an abnormal/unexpected effect, usually caused by underlying abnormalities of metabolism, excretion, or bioavailability

  1. ADR adverse drug reaction