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A Papaver somniferum
Drugs are chemical substances that affect the physiological or psychological functions in the living organism when consumed.
Hallucinogens are drugs that alter perceptions and mood of the individual. This state of altered perception is called hallucination.
Atropa belladonna and Datura are well-known plants with hallucinogenic properties.
Atropa belladonna is a highly poisonous plant, also known as deadly nightshade. The plant contains a high level of alkaloids that cause hallucinations.
Datura is widely distributed and easily accessible. It is highly toxic and contains a variety of alkaloids which causes hallucinations.
Cocaine is derived from the plant Erythroxylum coca, a plant widely grown across South America. Cocaine has a stimulatory effect on the central nervous system. It brings about high energy, increased heart rate, a state of euphoria, dilated pupils etc. It is highly addictive and may cause hallucinations when excessively used.
Opioids are a class of drugs obtained from the latex of the plant Papaver somniferum. Morphine and heroin are opioids, and are highly addictive. They bind to the receptors in the body and act as depressants. These however do not cause hallucinations.