Gamma Butyrolactone (GBL) is a chemical found in GHB and associated with GHB
Lim SS, Vos T, Flaxman AD, Danaei G, Shibuya K, Adair-Rohani H, et al
One of the most common concerns about e-cigarettes is the fear of developing popcorn lung. This misconception arose because some buttery flavoured e-liquids previously contained the chemical diacetyl, which, in extremely high exposures, has been linked to the lung disease bronchiolitis obliterans, known as popcorn lung
She added that banning menthol cigarettes could deter more younger people from smoking, saying: "It is naturally hard to inhale smoke and for many the first time they smoke it is repugnant, but people persevere with it and that's when they become addicted
If symptoms are severe, continue for a long time, or include chest pain or breathing difficulties, seek medical advice immediately