Table 1.

Features of pharmacological and hypersensitive ADRs. Adapted from Phillips.²

Properties	Type A(Pharmacological ADRs)	Type B (Hypersensitivity ADRs)
Predictable	Yes	No
Dose dependent	+++	+
Host Dependent (Genetic factors)	+	+++
Immunological Basis	-	+++

- No known association,

⁺low association,

⁺⁺medium association and

⁺⁺⁺high association between the ADR (Adverse drug reactions) and properties listed.