Cough
"This worked great for my husband until he gave me his cold. I used this medicine and was somewhat relieved but had extremely uncomfortable gas and diarrhea. I thought I had a worse strain of virus and took the medicine again the next day. Within 45 min my stomach problems that had quit the night before returned with a vengeance. Dextromethorphan was the only ingredient I haven&#039;t used before without this reaction. Unless it&#039;s a new red dye allergy, I&#039;m never taking anything with this ingredient again."