Nicotine is the active ingredient in cigarettes, cigars, chewing tobacco ... Nicotine may lead to many side effects. One of these involves getting headaches. Nicotine may increase your risk ...

When you start smoking, vaping, or chewing tobacco on a regular basis ... This causes unpleasant side effects — known as nicotine withdrawal — and is one of the reasons why quitting can ...

It’s a “pleasure thing” only because more hasn’t been done to show players the long-term effects of the agonizing plagues to which chewing tobacco can lead. They include cancer of the ...