In those who already have these conditions, second-hand vaping could cause the symptoms to worsen
Heated tobacco products heat reconstituted tobacco to temperatures between 350 and 550 C, producing an aerosol which contains lower concentrations of tobacco-specific nitrosamines, carbon monoxide and volatile organic compounds than conventional cigarettes, but with comparable nicotine emissions and sometimes higher levels of reactive oxygen species and pyrolysis products [10, 11]
We dont know all the answers, but we do know that smokers urgently need (and want) to quit smoking
Here is a plain summary of what the evidence supports when you combine Vyvanse and weed: Attention and focus often get worse, not better, because THC impairs the cognitive functions Vyvanse is meant to support Heart rate may increase more than with either substance alone, raising cardiovascular strain Anxiety, irritability, and mood instability can worsen, especially with regular or high-dose THC use Sleep quality tends to suffer even when cannabis seems to help with falling asleep initially Appetite effects conflict directly, with Vyvanse suppressing appetite and THC stimulating it The risk of developing cannabis use disorder rises with frequent use, particularly in people with ADHD That last point comes from a 2025 community-based study of adults with ADHD
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