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.
Introduction. Dextromethorphan (DXM) is an antitussive medication found in numerous over-the-counter cold/cough medications, such as Delsym, Robitussin Pediatric Cough Suppressant, and Vicks 44 cough medications.