Marijuana may treat some forms of light pain, but it is in no way comparable to opioids as an adequate treatment for pain. It may be similar to Tylenol 3 (small amount of codeine plus APAP) on an opioid scale that goes much, much higher to medications such as hydromorphone, oxymorphone and fentanyl. Even heroin would only be classified as a 'medium strength' opioid compared to these examples.