http://www.medications.com/effect/view/14027 Wow! This is amazing. My dad JUST started taking Singulair last week and his memory has deteriorated so much in one week that I thought he might be getting Alzheimers or Dementia! Now-I think it could be a side effect of this medicine. What a blessing it is Thu, 19 Jun 2008 22:38:28 -0400 http://www.medications.com/effect/view/14027?item=9328 Hi, i see your post is from 2006!! but i am wondering if stopping singulair helped. i am going through something similar with my mom and she has been taking this medicine for a while. http://www.medications.com/effect/view/14027?item=9328