I was taking it regularly, about 2 per day most times of the year, and thought my memory loss was due to something unrelated, like aging or, horror, Alzheimers. I actually got a neurological checkup. Of course it's listed as a possible side effect, but so is everything else. Saw an article about this drug possibly causing it. Stopped taking it. Miracle of miracles, I'm much better and seem to continue to improve.