👉 Demerol is a prescription-only medication that is used to treat moderate to severe pain. It is made from methadone, an opioid antagonist, and is available as a tablet or liquid injection. The medicine works by reducing the effects of pain by blocking the action of the neurotransmitter dopamine on the central nervous system. While demerol can be effective for some forms of chronic pain, it should not be used in cases where other treatments are ineffective or do not provide adequate relief. It is
