Psychoactive Drugs

Psychoactive Drugs are chemical substances that alter behavior, mood, perception, or mental functioning. Through the consumption of substances many cultures have found ways to alter consciousness. Psychoactive substances apply their effects by transforming biochemical or physiological processes in the brain. The message system of nerve cells, or neurons, relies on both electrical and chemical transmission. Neurons rarely touch each other; there is a microscopic gap between one neuron and the next, called the synapse. When a neuron fires, it releases chemicals called neurotransmitters into the synapse. Psychoactive drugs act by altering neurotransmitter function, they bind to the site of the firing neuron and inhibits this process so the neurotransmitters remain in the synapse, where they extend and increase the normal effect. The drugs can be separated into six key pharmacological classes based on their desired behavioral or psychological effect: alcohol, sedative-hypnotics, hall...