Comment by FireBeyond

There is zero comparison. Atmospheric 'fog' versus closed system directly into lungs with intention of cellular respiration is the same thing.

Before this the pro-vape crowd used to push the trope of "it's used in nebulizers", nope, it's not. Ventolin does not use propylene glycol: https://www.drugs.com/pro/ventolin.html Maxair? Nope: https://www.drugs.com/pro/maxair-autohaler.html Airomir did not.

> There is one study looking at the potential to use PG as a carrier for an inhaled medicine (https://www.ncbi.nlm.nih.gov/pubmed/18158714) and another which mentions that PG or ethanol may be used as a cosolvent (https://www.ncbi.nlm.nih.gov/pubmed/12425745) in nebulizers, but no evidence presented of an asthma inhaler or nebulizer that is actually used today containing PG.

Even then, there's a huge difference between "being on stage with a fog machine", and 3-4 puffs a day of a smaller amount of a nebulizer, than chronic hundreds of puffs a day with vapes.