Israeli pharmacists: Cannabis can cause side-effects, even death

The effects of cannabis, the report continues, can be euphoria or dysphoria, calm, anxiety or even psychosis. Additional phenomena include heightened wakefulness followed by drowsiness, a sharpening of the senses followed by slower comprehension, and increased motor activity followed by problems of coordination. “Many of these side effects of cannabis stems from a high dosage or chronic use,” writes the pharmacists' association.