In rare cases, the product can cause allergic reactions and cause irritation of the respiratory tract. Lung function and general health can be affected by the toxic effect. The use of vaporizers and their accessories is expressly and exclusively at your own risk. If you notice any undesirable effects on yourself or other people, stop using it and, if necessary, contact a medical specialist. If you are allergic to certain artificial or natural flavorings, we advise against using liquids.