I am trying to remember the name of a sci-fi novel I read in the nineties, when I was kid. It was a library book which, from what I can remember, was written maybe in the early 80's.
I remember in the first chapter a volunteer is injected with a drug that increases his IQ. As I recall, there is a random chance the drug might cause severe retardation instead.
After the drug takes effect, he walks out, and sees details he couldn't fathom before, like in the lobby the marble (columns I think?) has more meaning.
As pointed out in the comments below, it's not Flowers for Algernon.