Chlorpheniramine is an antihistamine. Dextromethorphan is a cough suppressant. Chlorpheniramine and dextromethorphan is a combination medicine used to treat sneezing, runny nose, and cough caused by the common cold. Chlorpheniramine and dextromethorphan may also be used for purposes not listed in this medication guide.
Common Sides Effects
Chlorpheniramine & dextromethorphan side effects.
Dry Mouth, Nose, or Throat.
Feeling Restless or Excited. (especially in a child).