The Harm of Illegal Drugs I plan to prove illegal drugs such as marijuana, heroine, and cocaine can be taken in different ways and are harmful. The first drug to be discussed is marijuana, also spelled marihuna. Marijuana is derived from a plant called hemp. It is made from dried leaves and flowering tops. At first marijuana was used as a medicine. It contains more than 400 chemicals. Marijuana is usually smoked in cigarettes, or pipes. “Most people who smoke marijuana are in the age of 12 and 18 years of age.”(vol 13 201). Some short term effects of marijuana are both known as psychological e