Marijuana is a drug that is produced from the elements of a certain plant called cannabis sativa. The most active ingredient in marijuana is tetrahydrocannabinol(THC). The drug is mostly used in several different ways. One of the most popular methods of distribution is to roll the leaves in paper and smoke it like a cigarette. Marijuana cigarettes are most commonly referred to as "joints". The second most common method of use is to smoke the marijuana through a pipe. Pipes come in a variety of sizes and styles, but the method of smoking is still generally the same. The third method of use is the least common. Occasionally people will simply ingest the marijuana by combining it with food. .
The effects of marijuana can be categorized into three types; the physiological effects, psychological effects, and the subjective effects. Physiological effects can be described as effects on the body directly. Psychological effects can be described as effects on the mind. Subjective effects can be described as an effect that leads to dependence of the certain drug. Some of the physiological effects are reddened eyes, increased pulse rate, and a dry mouth (cotton-mouth). The THC in marijuana is believed to change a psychoactive compound in the liver, which may be the cause of the psychological and subjective effects. The psychological effects of marijuana are most often seen in altered perceptions of distance and time, impaired memory and physical coordination, and a heightened sensitivity of the visual and auditory senses. The subjective effects refer to those effects that are going to change from person to person. Euphoria, lowered inhibitions, drowsiness, contentment, and relaxation are generally the desired effects of people who use marijuana. The euphoric feeling generally peaks in 10 - 30 minutes, and may last for up to three hours. People may experience adverse effects from marijuana use such as anxiety and paranoia.