Methorphan
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Methorphan comes in two forms
- Dextromethorphan - An over-the-counter cough suppressant
- Levomethorphan - The left hand isomer of the above, a potent acting opioid.
Racemethorphan
Racemethorphan is a racemic mixture of the stereoisomers of methorphan, namely dextromethorphan, which is the active ingredient in "DM" cough syrups, and the lesser known levomethorphan which is described as a controlled substance in The Merck Index - likely because it has more potential for abuse than its dextro enantiomer .
Levomethorphan is the methyl ether analog of levorphanol and these two substances are related in the same way that codeine (which is the methyl ether of morphine) is related to morphine .
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
