Long-term usage of marijuana may lead to addiction. This has harmful effects on social relationships with family, work, school and entertaining activities. It causes sleeplessness, decreased taste, bad temper and anxiety all of which make it hard to quit. Excessive use of marijuana causes depression, anxiety, suicidal desire and schizophrenia.
Chronic use of marijuana, especially in youngsters causes risk of mental illness, vulnerability, and exposure to violence. The heart beat rate after abusing marijuana is increased by 20 to 80 percent and this effect can last for over 3 hours.