... the cannabis plant, marijuana varies significantly in its potency, depending on the source and selection of plant materials used. The form of marijuana known as sinsemilla (Spanish, sin semilla: without seed), derived from the unplanted female cannabis plant, is preferred for its high THC content. Marijuana is usually smoked in the form of loosely rolled cigarettes called "joints" or hollowed out ... . Depending on the dose, the drug can produce delusions and visual hallucinations, which can be frightening and cause panic. Users refer to their experience with these acute adverse reaction...

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