Menthol competes for the same enzyme that breaks down nicotine, keeping nicotine active longer. It is also a moderately strong kappa-opioid receptor agonist: va

Menthol competes for the same enzyme that breaks down nicotine, keeping nicotine active longer. It is also a moderately strong kappa-opioid receptor agonist: vaping too strong menthol liquid can induce extreme dysphoria, anxiety and panic attacks.