The physical effects of marijuana use, particularly on developing young adults, can be acute. A recent study of 1,023 trauma patients admitted to a shock trauma unit found that one-third had marijuana in their blood. Although many people smoke because they believe cigarettes calm their nerves, smoking releases epinephrine, a hormone which creates physiological stress in the smoker, rather than relaxation. The use of tobacco is addictive. Most users develop tolerance for nicotine and need greater amounts to produce a desired effect.
Cigarettes are highly addictive.
About Alcohol Alcohol abuse is a pattern of problem drinking that results in health consequences, social, problems, or both. However, alcohol dependence, or alcoholism, refers to a disease that is characterized by abnormal alcohol-seeking behavior that leads to impaired control over drinking. About Ecstasy Ecstasy is an illegal synthetic, or designer, drug. Designer drugs mimic an already illegal drug by slightly altering the chemical composition. Ecstasy is also called MDMA, which stands for methylenedioxymethamphetamine.