I did a search regarding bulging eyes and this is what Google said: “What drug causes eyes to bulge?
This includes the muscles in your eyes that are responsible for making your pupils bigger (to let in more light, for example), or smaller. After taking cocaine, marijuana, or amphetamines, for example, your pupils get noticeably larger (Mydriasis), while opiates such as heroin constrict the pupils (Miosis).”
Also, hypothroidism.