Hong Kong set to ban newly emerging drug known as 'space oil' next year South China Morning Post Hong Kong Customs and Excise Department Press Release Hong Kong Customs seizes suspected "space oil drug" worth about $8.4 million at airport (with photos) Vaping can lead to harmful addiction. Dangerous substances such as etomidate can be added into e vaporisers. The Government will be classifying etomidate as a Class C controlled drug under the Misuse Explainable Deep Learning Combined with SERS for Simultaneous Detection of Nicotine and Etomidate Isomers in E Cigarettes ScienceDirect