I think that song is suppose to kinda be about society as far as they are talking about the disease that is America today and the brompton cocktail is acctually a elixer that is alot of the time made with heroin cocaine a gin along with other ingrediants and was named after the brompton hospital and it is giving to people that have toberculoses and cancer to ease the pain and he could be saying that he needs the shot of heroin (brompton cocktail) to die to see god cauyse this earth is so bad.