Dextromethadone (Discontinued) is an antitussive opioid. It is the (S)-enantiomer of methadone. Dextromethadone acts as a N-methyl-D-aspartate NMDA receptor antagonist similar to ketamine. There is now an asymmetric synthesis available to prepare both dextromethadone [S-(+)-methadone] and levomethadone [R-(–)-methadone]. Dextromethadone is discontinued (DEA controlled substance, DEA Schedule II). References: Breivik H. Pain management discussion forum: prevention of chronic postoperative pain. J Pain Palliat Care Pharmacother. 2014 Sep;28(3):314-5. doi: 10.3109/15360288.2014.941137. PubMed PMID: 25166777.

纯度：≥98%

CAS：5653-80-5