Louis , which profited by the sinking of the Lusitania to charge the highest rate to those who were afraid to take passage on any but an American ship
Usually, they would mix with your saliva as they accumulate in your mouth
Furthermore, the digestion issues caused by nicotine above can cause acid reflux - acid reflux itself can damage and weaken the esophagus, as well
Many others are toxic, damaging the heart, lungs, and other organs
That's part of why they're bad for you
Usual doctor recommendation is to start using it 1 2 weeks before cessation, in order to give your body a chance to accumulate levels of the drug needed to combat craving onset