Heroin users who inject the drug expose themselves to additional risks, including contracting human immunodeficiency virus (HIV), hepatitis B and C, and other blood-borne viruses. Chronic users who inject heroin also risk scarred or collapsed veins, infection of the heart lining and valves, abscesses, pneumonia, tuberculosis, and liver and kidney disease. Approximately 50,000 Canadians are arrested each year for marijuana related crimes. Ecstasy is usually taken by mouth in a pill, tablet, or capsule. These pills can be different colors, and sometimes the pills have cartoon-like images on them. Some ecstasy users take more than one pill at a time, called "bumping." Once in the brain, heroin - similar to other drugs of abuse - causes the release of dopamine, a neurochemical that mediates pleasure and is vital to the normal functioning of the central nervous system. The drugs addictive properties are believed to be related to a chronic and unnatural increase in dopamine levels. |