If opioids were sold for recreational purposes, companies would compete to invent an opioid that you simply can't OD on, or it's very difficult to OD on. Maybe

If opioids were sold for recreational purposes, companies would compete to invent an opioid that you simply can't OD on, or it's very difficult to OD on. Maybe, that version could be the legalized version and every other version banned. Other than the risk of overdose, does opioid use generate any more health problems than say alcohol use?