what is mean by nicotine
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a toxic colourless or yellowish oily liquid which is the chief active constituent of tobacco. It acts as a stimulant in small doses, but in larger amounts blocks the action of autonomic nerve and skeletal muscle cells.
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Nicotine is a widely used stimulant and alkaloids that us naturally produced in the nightshade family of plants.
it is used fir smoking cessation to relieve withdrawal symptoms.
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