my memory is sort of fucked, so I can be positive, but I believe I've taken DXM over 200 times in the span of about 3 years. Starting off with Tussin DM syrup 4oz to

z to 12oz to 16oz to coricidin...the most I did of that was probably 30 at one time....after I found out about the dangers of Triple C's I started downing two bottles of Robogels to downing 5 bottles of Robogels....and then Zicam came out with the Cough Melts and Cough Mist. These are what would finally curb my enthusiasm towards DXM use altogether. The most frequent I was doing DXM was probably a few times a week at the beginning to every few months in the middle and now I only take DXM to potentiate opiates.
I can agree with Elinisti in saying that many times after I would use DXM, the whole next week I would feel great about things and would also be into a more sober lifestyle but it would fade after about 2 weeks and I would end up feeling worse than before.
I have had unexplainable things happen to me on dex... one time I drank 3 Zicam Cough Mists...the daytime kind, not the night (daytime is like 340mg opposed to like 540mg plus some alcohol in the night kind). I had swiped these from Walmart and didn't realize that one of the three had Phenylephrine in it, the decongestant that replaced psuedoephedrine. I walked to the Mcdonalds five minutes down the road to meet a friend that was picking up my money because they were getting me a quarter of some reggo's....I vaguely remember getting back to my house...but I remember distinctively feeling and thinking "Oh shit, this is coming on strong..and fast...not in a good way" somewhere between my driveway and mickey d's (maybe 2000 feet tops). This fateful night would send my soul out of my body and show my true self what I was getting into...who I could be joining and where. It was just like this dark and evil dimension that was packed with very bad entities of people that had done bad shit and been drug addicts. I don't remember any language being spoken or any one being talking to me...I just already knew why I was there and what was around me and why I was being shown this. At this point, I remember my mom somehow coming into the OBE with me and pulling me as I was being pulled by another force. I remember her saying some sort of prayer or something of the sort and feeling like I knew she had to give up something significant in order to trade for my life. While I was blacked out (something that has never happened before while taking DXM, even with alcohol)..I guess I was falling down my stairs and doing ridiculous things. I thought it was nuts that my soul could be somewhere else while my body was still doing things. Like I was in two places at one time. I told my mom about how I saw her and felt her presence during what had happened and I knew how she had given something up to save me from being torn into another world....she immediately got super quiet and said, "yeah well it better not happen again because im not going to be your little trip sitter" she has never fully admitted to what happened, because I think she just doesnt want to talk about it, but I know she helped save me. After this I went to rehab a week later after using dex again at a much much lower dose, but using again nonetheless...
I liked whoever said that this is the psychedelic version of huffing gas. It's poor man's acid. I mean, pure dextromethorphan hydrobromide or hydrocholoride is one thing, but all these OTC products with inactice ingredients and all the other shit thats packed in there....theres no way it is healthy...sure, it may be beneficial and I love to use it in combination with Tramadol or other weak opiates to make them a little bit better...but I think DXM really fucked up my head for a long time. My muscle were weaker, my thoughts were crazier, my concentration was nonexistant, my emotions were all over the place and I embarassed myself and my family becoming a stupid cough medicine junkie.