What Drug Is Often Used As A Cough Suppressant?

What Drug Is Often Used As A Cough Suppressant? Dextromethorphan (DXM) is a cough suppressant found in many OTC cold medicines. The most common sources of abused DXM are “extra-strength” cough syrup, tablets and gel capsules. OTC medications that contain DXM often also contain antihistamines and decongestants. Do opioids suppress cough? Opioids are the only