Slang: weed, pot, mary jane, ganja, reefer, grass

Effects: permanent lung damage, difficulty in perception and coordination

Basic facts: Can be a brown, green, or grayish mixture of leaves, stems, seeds, and buds of the plant; the active ingredient is THC

Signs of use: dizziness, red/bloodshot eyes, difficulty remembering recent events, laughing for no reason, distinct smell on clothing and breath

More information is available at the following links:

Marijuana Addiction Information

Tips for Teens: the Truth about Marijuana