The same way they know to prescribe any drug, I guess.That just sounds hilarious to me. What ailment do they claim is treated with nicotine? Or, more so, how do the doctors decide who needs a prescription and who doesn't?
I'd assume if they do prescribe nicotine vape it would be to help people transition off cigarettes, and eventually quit smoking. But my feeling is a doctor would be more likely to prescribe other items for that task. How often vaping juice is actually prescribed in real life, I have no idea. My guess is not very often at all.