People do vary in their sensitivity to certain drugs, as Gladius says; but it’s worth noting that there are a lot of receptors in the brain referred to as “nicotinic” receptors because the neurochemicals they respond to are chemical relatives to nicotine, and thus are stimulated by nicotine – and that tobacco companies have been including additives for years in order to enhance the addictive properties.
People do vary in their sensitivity to certain drugs, as Gladius says; but it’s worth noting that there are a lot of receptors in the brain referred to as “nicotinic” receptors because the neurochemicals they respond to are chemical relatives to nicotine, and thus are stimulated by nicotine – and that tobacco companies have been including additives for years in order to enhance the addictive properties.