Marijuana is the most commonly used illegal drug in the United States. The drug is primarily smoked, sometimes eaten. Its intoxicating effects include relaxation, sleepiness, and mild euphoria (getting high). Marijuana can cause undesirable side effects, which increase with higher dosages. These side effects include dry mouth, red eyes, impaired perception and motor skills, decreased short term memory, paranoia, mood swings, and hallucinations. The amount and effect of these side effects varies from individual to individual. Related topics:

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