The Drug-Induced Respiratory Disease Website

Marijuana, cannabis (haschish, hash, bang, dab)

Hypersensitivity pneumonitis pattern

McGraw MD, Houser GH, Galambos C, Wartchow EP, Stillwell PC, Weinman JP

Marijuana medusa: The many pulmonary faces of marijuana inhalation in adolescent males.

Pediatric pulmonology 2018 12;53;1619-1626 — 2018 12 — 1619-1626

Diagnosing DIRD

Drug and radiation history

Drug singularity - Correct identification of the drug

Consistent timing of exposure v. onset of symptoms

Clinical, imaging, BAL, pathological pattern consistent with the specific drug

Careful exlusion of another cause

Remission of symptoms with removal of drug

Recurrence with rechallenge (rarely advisable)

Causality assessment

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