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Phsycoactive DrugsEssay Preview: Phsycoactive DrugsReport this essayPsychoactive 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. Psychoactive drugs act by altering neurotransmitter function, they bind.