Zombie cigarettes" vaping pen cartridges loaded with the general anaesthetic etomidate have been growing in popularity in Asia. Their increasing prevalence in Japan has led to calls for a crackdown, Japan to investigate e cigarette safety after formaldehyde findings Vaping The Guardian Cigarettes lectroniques : des mtaux toxiques trouvs dans les vapeurs des nouveaux modles Japan to investigate e cigarette safety after formaldehyde findings Vaping The Guardian