yeah, i obviously know nothing... but I was only providing my opinion.
Here is what they said at erowid.
# Nausea, stomach cramps, and other unpleasant gastro-intestinal effects are common and may persist for days after use.

# Itching and other skin reactions have been reported.

# The large amount of glucose, thickeners, etc., present in many cough syrups may be hard on your kidneys and pancreas.

# Regular or frequent DXM use can lead to craving the experience and to emotional dependence. Ã? Although not common, some people go on to use DXM daily and can find it difficult to quit.
Products containing any active ingredients other than 'DXM' or 'Dextromethorphan' should not be used.

Be cautious as to these other drugs commonly found in robotussin or similar varieties of cough syrup.
* High doses of Guaifenesin can cause severe nausea and vomiting.
* High doses of Acetaminophen can cause liver-damage and may be fatal. Some brands of DXM containing cough-syrups, including Drixoral Cough and Fever contain acetaminophen.
* High doses of Chlorpheniramine Maleate can cause severe and life-threatening symptoms including seizures, loss of consciousness, bleeding from skin, mouth, rectum, and vagina, and possibly death. Some brands, including Coricidin Cough and Cold contain Chlorpheniramine maleate.

Tolerance increases pretty quickly too, so you may be putting more and more toxins into your body that can be detrimental. I just think that shrooms are a better alternative, that's all. Nowhere did I say these are the facts, and they are most certainly the bottom line. I said "most people say..." Sorry I misspelled a word, you had better call me a damn idiot. ( should i point out the fact that you put "your" instead of "you're"?) No need to jump down my throat just because you disagree. The point is that I was just giving my opinion although some of it may have been influenced by hearsay. I know I learned my lesson from all of this: don't have an opinion because someone might disagree with it...
In closing, I give you a quote from pink floyd:
"Black and Blue. And who knows which is which and who is who."