I have been on Minocycline for coming up 9 years now and i'm currently down to one 50mg pill a day to control my acne, my question is what effects does it have on my cognitive ability and memory over such a long period of time. I suffered the general symptoms when i first started, nausea, vertigo, blurred vision, loss of appetite but that went away after 2 or so weeks and i have minor continuing symptoms of skin discoloration but i have noticed that over time my cognitive ability has decrease and my memory doesn't seem to retain even the simplest request. My mind feels fuzzy and impaired. Can minocycline be the cause to my mental decrease?