From the question, it appears that you are experiencing memory problems and hallucinations after taking Concerta (Methylphenidate). Concerta is also marketed as Ritalin and is used to treat attention deficit hyperactivity disorder, narcolepsy, and other developmental disorders. It functions by increasing the levels of dopamine and norepinephrine in the brain by prevent their re-uptake . . . → Read More: Sometimes people ask me what this person just told me, and I have quite some difficulties answering … because it takes me a long time to remember. And sometimes I remember things that happened to me, but I can’t remember who the person involved was. And it seems that it’s since I started taking it that I forget things. Sometimes I tend to mix my dreams with reality, it take me some times to realize that this event didn’t happen. And also, a bizarre event happened last week or two weeks ago: I slept in a car while it was almost -30 degrees Celsius outside. During that time, I had some very bizarre lucid dreams. I felt the cold, and was dreaming at the same time. (Only slept for about 1 hour). And I never got any kind of cold or hypothermia after. What do I have? I.N.: I take a daily Concerta medication. And I am a severe dyslexic
