Marijuana: A drug made from the Cannabis plant.  The main ingredient is THC. This drug is also known as pot, weed, reefer, Mary Jane, dope, grass, ganja, hash and herb.

Mary Jane: Please see Marijuana.

Menstruation: The monthly flow of blood shedding the uterine lining when pregnancy does not occur.  Also known as one's Period. See related article on Teen Menstruation

Methamphetamine: A crystalline hydrochloride form of amphetamine used as a central nervous system stimulant.

Methamphetamine Abuse: Any usage of methamphetamine or amphetamine beyond what is prescribed by a physician.  This is not to say that a physician's order cannot be abused.

Methamphetamine Dependency: The constant need to increase the amount of methamphetamine usage to get the same results.

Methaqualone: A sedative drug similar in effect to barbiturates. Also known as Quaaludes.

Mood Stabilizer: Mood Stabilizers are most often used in the treatment of Bi-Polar Disorder.  Lithium and Depakote are the most commonly used in this treatment.

Morning After Pill: This is known as the Emergency Contraception Pill.  It contains high doses of hormones found in oral contraceptive pills. See related article on Morning After Pill

Morphine: Please see opiates.

MSW: Master of Social Work.

Mushrooms: Also known as psychedelic mushrooms, sacred mushrooms and magic mushrooms, which when chewed can cause hallucinations.