special subjects
Vaping
Introduction
Vaping refers to the inhalation of volatilized liquid (vapor) produced by battery-powered devices. The vapor is primarily water, which is the vehicle for a variety of pharmacologically active substances, particularlynicotineand tetrahydrocannabinol (THC). Although the liquid ingredients are volatilized by heating, there is no combustion involved; the apparent "smoke" that results is water vapor. 