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What are psychoactive drugs? Add a note ...

What are psychoactive drugs? Add a note Marijuana and Opium.

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Phytochemicals or drugs from some of the plants alter an individuals perceptions of mind by producing hallucination are known as psychoactive drugs.
Marijuana:
Marijuana is obtained from Cannabis sativa. The active principle in Marijuana is trans-tetrahydrocanabinal (TCH). It is used as pain killer and reduce hypertension. It is also used in the treatment of Glaucoma, cancer radiotherapy and asthma, etc.
Opium:
Opium is obtained from the exudates of the fruits of papaver somniferum (poppy plants). It is used to induce sleep and relieve pain. Opium yields morphine which is used as a strong analgesic in surgeries.
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Assertin : Alcohol is a psychoactive drug, affecting person's mind and behaviour. Reason : Alcohol acts on brain and slows down the activity of brain.