Daily Med from the National Library of Medicine reports that M-END DM cough syrup contains Chlorpheniramine Maleate, an anti-histamine, Dextromethorphan Hydrobromide and Pseudoephedrine Hydrochloride M-END DM cough syrup relieves stuffy nose, runny nose, itchiness, watery eyes and reduces coughing and sneezing.
The medication is used for colds, flu, allergies and respiratory conditions such as bronchitis. WebMD advises that the medication eases symptoms but does not cure colds. The cough syrup has side effects, such as excitability, drowsiness, nervousness and sleeplessness, according to Daily Med. In addition, this medicine should be avoided by certain individuals, such as those taking monoamine oxidase inhibitor or MAOI drugs.