I used to be hooked on Robitussin. It's a disassociant, like PCP and Ketamine. I had seizures, and a few times I OD'd and hit my head on the floor or sidewalk. It was a really horrible addiction, made easier by the fact that the drug, dextromethorphone, is easily available at any pharmacy. I'd like to say I quit through perseverance, but actually, I changed antidepressants and it didn't have the same euphoria any more. I have some events missing from my memory due to the chemicals and concussions. It's also an opioid so I got withdrawals when I stopped taking it. I wouldn't recommend this to anyone! And if you have kids in the house, lock up the cough syrup, because it can kill someone if they drink too much. I'm glad I was able to stop without too much trouble.