hi its ashley i am on 40mg of namenda for about 3 months now. has anyone experienced doing something such as maybe walking up stairs or showing some one something on the web and forgetting you even did it. sounds strange i know. even when i drive i feel like i am in a fog, not as sharp with driving. wondering if anyone takes namenda and if they feel like i do. the only other meds i am on is topamax 100 mg , nadolol (corgard) 10mg.