How Many Zopiclone Tablets Cause Death?

hi i need to know how many 7.5mg zopiclone tablets will guarantee death or a coma, i know its a silly question but i have made up my mind, i do not want to feel any pain and i certainly dont want to end up with seriouse medical problems, i realise i will need to drink alcohol aswell,......please dont get preachy just a number would be grate