Marijuana is still the most popular illegal drug in the United States. Marijauna is derived from the marijuana plant and is either smoked or cooked into foods and eaten. Marijuana is traditionally thought of as not addictive; however, long-term abuse of marijuana can result in a lack of motivation that can undermine academic and career success. Marijuana is thought by experts to be psychologically addictive in that users feel uncomfortable when they cannot use the drug.
