Internal Medicine Board Review / USMLE Exam Review: Medical Mnemonic for types of Hypersensitivity Reactions - "ACID"

1. Hypersensitivity Reactions - Types
Mnemonic: “ACID”
Hypersensitivity Reaction
Description
Type I
Bee stings
IgE-mediated; quick onset after exposure Latex
Certain medications (e.g. Penicillin)
Allergic
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Type II
Cytotoxic/antibody-mediated
Cytotoxic
Hemolytic reactions
Goodpasture syndrome
Hyperacute graft rejection
Type III
Hypersensitivity pneumonitis
Systemic lupus erythematosus
Polyarteritis nodosa
Serum sickness
Immune complex/IgG/IgM mediated
Immune complex deposition
Type IV
Delayed or cell-mediated
Delayed
Chronic graft rejections
PPD test
Latex
Nickel
Poison ivy