Methadone is an opioid drug. This medicine may contain drugs like heroin which gives relief in pain. It is used to treat a patient when they are suffering from too much pain. Always take it with the advice of a doctor because it is a drug that can be addictive and taking it in excess can be harmful for health. Along with some benefits, all medicines also have some disadvantages or side effects. If these medicines are not taken in the right way and in the right dosage, then side effects can be seen such as vomiting, Heavy sweating, Weight gain.

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