2. Poisonous and Medicinal. Just a matter of degree!Nicotine is a great example:Cigarettes are smoked because the nicotine is a stimulant; it is also addictive Nicotine is extremely toxic; on par with cyanide, heroin, atropine. LD50 is less than 5 mg per kg of body weight. Average lethal dose is 7 drops of pure nicotine.Nicotine content of cigarettes is regulated to a maximum of 1 mg per cigarette.Average human is 155 lbs or 70 kg; therefore the LD50 for a 70 kg human is about 350 mg or 351146
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