Type A reaction | Type B reaction |
Predictable | Unpredictable |
Common, rational | less common, bizarre, not rational |
Related to drug pharmacologic actions | Related to individual susceptibility. |
Dose dependent | Not dose dependent |
Examples: ・ Toxicity: renal failure from aminoglycosides. ・ Side effect: sedation from antihistamines. ・ Secondary effect: diarrhea from antibiotics. ・ Drug-drug Interaction: theophylline toxicity from concomitant erythromycin | Examples: ・ Intolerance: tinnitus from Aspirin ・ Idiosyncratic reaction: hemolysis from Dapsone in G6PD deficiency. ・ DHR: anaphylaxis from penicillin. ・ Pseudo allergic anaphylaxis due to radio contrast media. |