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  1. Methadone: Uses, Dose, Side Effects, Drugs.com

  2. Methadone - Wikipedia

  3. Methadone: Purpose, Uses, Side Effects, and Risks - WebMD

  4. Methadone | SAMHSA

  5. Methadone: 7 things you should know - Drugs.com

  6. Methadone: Side Effects, Dosage, Uses, and More - Healthline

  7. Methadone: MedlinePlus Drug Information

  8. Methadone (Oral Route) Description and Brand Names - Mayo …

  9. Methadone - StatPearls - NCBI Bookshelf

  10. Methadone (Oral Route) Proper Use - Mayo Clinic