After reviewing the literature the author concludes that there is a tendency to designate as adverse any reactions to marijuana that are psychotomimetic or anxiety provoking or that interfere with functioning. He feels that the definitions of the term "adverse marijuana reactions" are ambiguous. Before the term is applied, the user's character structure, expectations of the experience, environmental factors present at the time of ingestion, and the amount ingested should be taken into account.Abstract Teaser