Inhaled therapies that require P-gp substrates include beclomethasone, budesonide, ciclesonide, mometasone, fluticasone furoate, olodaterol, vilanterol and umeclidinium

Envisioning a world where cigarettes would no longer create or sustain addiction, and where adults who still need or want nicotine could get it from alternative and less harmful sources, needs to be the cornerstone of our efforts. In its press release surrounding the Gottlieb announcement, the agency added: A key piece of the FDAs approach is demonstrating a greater awareness that nicotine while highly addictive is delivered through products that represent a continuum of risk and is most harmful when delivered through smoke particles in combustible cigarettes. So a product like IQOS that heats tobacco to release nicotine without combustion should be a slam dunk for FDA approval especially because IQOS is attractive primarily to smokers who want to quit, but are challenged by the taste and tactile difference between cigarettes and vapor products
G.KlepacP.LiuY.PremK.JitM.CMMID COVID-19 working groupet al (2020)
Despite widespread consensus on the harms of other tobacco products, the health risks of chewing tobacco have been less studied and are less well understood
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