Meet pain specialist Methadone, activated muscles. Two different character doses Methadone 5 Mg and Methadone 10 mg. Methadone is sold in the market under the brand name Dolophine. Methadone is prescribed FDA approved medication for the treatment of chronic back pain. This medication is perfect for muscle pain that easily workout every day. Take Methadone with or without food one glass of water, before going to bed for better results, and take rest properly. If you taking Methadone do not stop it suddenly, may cause different side effects.