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Methadone - Wikipedia
Methadone: Uses, Dose, Side Effects, Drugs.com
Methadone: Purpose, Uses, Side Effects, and Risks - WebMD
Methadone | SAMHSA
Methadone: Side Effects, Dosage, Uses, and More - Healthline
Methadone: MedlinePlus Drug Information
Methadone: Uses, Warnings & Side Effects - Cleveland Clinic
Methadone (Oral Route) Description and Brand Names - Mayo …
Methadone (Oral Route) Proper Use - Mayo Clinic
Methadone - StatPearls - NCBI Bookshelf