Dextromethorphan
"I went to my dr yesterday n was diagnosed with severe bronchitis and was told this was a good med to take to alleviate my 'tight' breathing and coughing. My Dr suggested it for night time use. I took the recommended dose and it did great with the cough. However, I woke up a few hours later and felt my insides shaking like mad, having horrible stomach cramps like I was going to have diarrhea, it never really 'came about' but when I got up in the middle of the nite I hit a wall I was so dizzy. Never again. I get better results from other much cheaper products. So wanted to love this. I am a pharm tech and I have seen many people buy it. I thought I was just sensitive to the med because I am sensitive to meds sometimes."