If you already have high blood pressure, THC isnt likely to decrease it enough to make your eyes red
An additional regulatory approach that could be incorporated into a nicotine reduction policy is differential taxation, such that taxes on combusted tobacco products are much higher than those on cleaner nicotine delivery products

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Neurotoxicology 75:123128 Muthumalage T, Prinz M, Ansah KO, Gerloff J, Sundar IK, Rahman I (2017) Inflammatory and oxidative responses induced by exposure to commonly used e-cigarette flavoring chemicals and flavored e-liquids without nicotine