It is not the oxygen that is flammable, it is the substance that burns. The more oxygen, the easier and faster to burn. Views Â· View Upvotes.
Dextromethorphan (DXM or DM) is an antitussive (cough suppressant) drug of the morphinan class with sedative and dissociative properties.
This is a quick question-and-answer section about DXM which avoids most of the technical detail of the full FAQ sections. However, since DXM is a complex drug, you are advised to read the appropriate sections in the full FAQ.