Generally not. Occasional ingestion of e-liquid from e-cigarettes is not poisonous. The main components of e-cigarette oil are vegetable glycerin, best electronic cigarette，propylene glycol, nicotine, flavor and other additives.
These ingredients are not toxic, but the propylene glycol ingredient is slightly irritating. If you accidentally get the e-juice into your mouth, it is recommended to rinse your mouth immediately and flush the e-juice out of your mouth, so don’t worry too much.
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