Pen-type vaporizers are easy to use and may go unnoticed because they produce little smoke, says Raiman. (Keep in mind that Oregon and some other states have laws that prohibit vaporizers in the same places where smoking is prohibited). Kickback, a manufacturer of cold coffees and frozen teas bottled with infusion of Sera Labs CBD Oil, sells its products in California, New York and Texas.

The CBD cartridges used in pen-type vaporizers may contain a solvent called propylene glycol, which is also used in electronic cigarettes that contain nicotine, says Earleywine. At high temperatures, propylene glycol can degrade into formaldehyde, a chemical that can irritate the nose and eyes and could increase the risk of asthma and cancer. Earleywine suggests looking for pen type Sera Labs CBD Oil vaporizers that claim to contain oils without solvents.

In addition, controlling the dosage can be particularly difficult with pen-type vaporizers. How much CBD you absorb depends on how hard you inhale and for how long, says Earleywine. In addition, the instructions on labels on vaporizing devices can be especially confusing, he says.