This drug (Marijuana) can be either a stimulant or a sedative depending on the strain used. It is either smoked or eaten and causes a feeling of being "high" for several hours after use. Several regularly observed physical effects are an increase in heart rate, bloodshot eyes, dry mouth, dry throat and increase in appetite. Use of Marijuana may decrease short-term memory and comprehension, alter the sense of time and reduce ability to perform certain tasks such as driving a car. THC (Tetrahydrocannabinol / Marijuana) can also produce paranoia and psychosis. Some terms for this drug are: marijuana, weed, grass, pot, reefer, joint, roach, mary jane, maui wowie, loco weed.