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The main addictive component in many e-liquids used in e-cigs (referred to as vaping) is nicotine [1]

Nicotine exposure leads to deficits in differential cued fear conditioning in mice and humans: A potential role of the anterior cingulate cortex

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Inhaled Proteins: Medical and Therapeutic Inventions Proteins are inhaled for local lung treatment (e.g., breaking down mucus in cystic fibrosis) or systemic effects (e.g., hormone replacement) Part 2 How it works: Amino acids are dissolved in carriers (e.g., propylene glycol or ethanol), heated/vaporized, or spray-dried into powders for DPIs