Marijuana and is derived from the leaves and flowers of the hemp plant. Marijuana is smoked, especially in the form of hand-rolled cigarettes, and both drugs are also smoked in a pipe.

LSD is an amide of lysergic acid and which was originally used in the study of schizophrenia and other mental disorders. It is now recreationally used for its hallucinogenic effects.

Cocaine and crack are alkaloids extracted from the leaves of the South American coca plant. Use of these drugs induces a sense of exhilaration in the user primarily by blocking the reuptake of dopamine in the brain.

Opiates are made from the poppy plant. They are also referred to as narcotics. Heroin and morphine are opiates. Opiates can produce feelings of pleasure, but they can also lead to addiction.

Methamphetamine abuse is a very serious and growing problem. These ingredients are cooked in meth labs, causing a negative impact on the environment due to the release of noxious gas into the atmosphere and the creation of significant amounts of toxic waste.

Amphetamines are a class of compounds that stimulate the central and peripheral nervous systems. The structure of amphetamines is similar to dopamine, serotonin and other cell-produced amines and may explain their actions.

MDMA (methylenedioxymethamphetamine) is a synthetic, psychoactive drug structurally similar to the methamphetamine and a hallucinogen known as mescaline. Street names for MDMA include the well-known drug Ecstasy. MDMA is used by a wide variety of age groups in many areas of the country.

Morphine is a natural substance found in the opium poppy. It is a powerful narcotic analgesic that is used primarily in the management of severe pain. Second only to heroin, morphine has the greatest danger of dependence of the narcotic analgesics commonly used. Morphine is not frequently found in the street drug culture. Mostly because it is available in hospitals, there have been a number of documented cases of morphine dependence among health care professionals.

Heroin is processed from Morphine, a naturally occurring substance extracted from the seedpod of the Asian poppy plant. Heroin is the most abused and the most rapidly acting opiate.

PCP is a white crystalline powder that dissolves easily in water or alcohol. The drug has a unique bitter chemical taste. PCP can be mixed with dyes and is sold on the illicit drug market in tablet, capsule, and colored powder form.

Methylphenidate, sold under the brand name Ritalin, is a mild central nervous system stimulant that is administered to children and adults who exhibit symptoms associated with attention deficit hyperactivity disorder (ADHD). Although Ritalin is not an illegal drug, it is often illegally shared (sold or bartered) and abused by college students, particularly during exam times.