Medically reviewed by Kashif J. Piracha, MD Key Takeaways You can get addicted to nicotine within days of starting to use it.

When I was in medical training in the 1970s, 40 percent of adults in the U.S. smoked cigarettes. There were cigarette vending machines everywhere, cigarettes cost a low 40 cents per pack, making teen ...

Until now, the storm over e-cigarettes has largely focused on how to keep the products away from minors. But the pervasiveness of nicotine addiction among teenagers who already use the devices is now ...