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Message: <blockquote data-quote="thatguy1" data-source="post: 1987899" data-attributes="member: 309318"><p>Nicotine acts directly on the heart to change heart rate and blood pressure. It also acts on the nerves that control respiration to change breathing patterns. In high concentrations, nicotine is deadly, in fact one drop of purified nicotine on the tongue will kill a person. It's so lethal that it has been used as a pesticide for centuries.</p></blockquote><p></p>