Singulair and muscle weakness

I aged ten years in a month. My legs lost any muscular power and I needed help to get up our 3 steps to the front door. My eyes are sore and my balance is also affected. What I do not know is how long am I going to be affected like this. I began to think that I was starting with either motor
neurone disease or Parkinson's disease.
Muscle weakness, loss of balance, bad dreams,anxiety, irritability.joint pain.sore itchy eyes and difficulty focusing on printed pages.
A., Yorkshire, England.I am 69 years old and prior to Singulaire I was pretty fit for my age.

I started taking singulair 2 weeks ago and was surprised it worked so quickly to relieve my allergy symptoms but then about 4 days into treatment i started feeling strange, i felt not like myself i could not explain it, well then one morning i noticed i was pale and then the muscle weakness began and then 2 days later i started getting bad muscle cramps and very bad muscle tightness in my back shoulder and neck.I stopped taking it 2 daays ago and right now i am suffering from terrible back muscle spasms.I think this medicine is a poison and the fda better take a better look at it.

I am a 57 year old man, who has been suffering from asthma several years. This spring my doctor put me on Singulair as an additional medicine to my cortisone-inhalator. after one month I feel symptoms of depression an mood-changing, severe ups and downs.
AND - as an additional symptom i have partially lost my feeling in some fingertips, and now parts of my left thumb and even a feeling of "cold2, mostly in my left hand.
anyone who share that symptom?
M.

My 15 year old daughter has been taking Singulair for about 10 years for asthma, and it seemed to do a great job of controlling that condition. However for the past year or two (since onset of puberty) her mood swings, anxiety, sleep problems, ability to concentrate, etc., seemed to escalate to extremes. She has always been a little high-strung and emotional, but I never related it to the medication. Lately I tried to convince myself everything was a result of hormone fluctuations although things were going from bad to worse. Late this fall she suffered a series of back-to-back illnesses (flu, sore throats, etc.) which caused her to miss so much school she almost flunked her entire first semester of high school. After the holidays she seemed to be back on track but then another bout of flu triggered asthma, and then she seemed to bounce from one to the other - and missing a lot of school again which caused a lot of anxiety, which caused the asthma to flare, causing greater anxiety, etc., etc. For almost 3 weeks she barely came out of her bedroom, and looked more despondent by the day, begging me to not force her to go back to school because people would make fun of her. After lots of arguing one Saturday she agreed to go with me to a therapist while we tried to find alternatives for school this year. Well, that same night my daughter woke me around 3 a.m. (she also does not sleep well...) to tell me about the story she had just heard on CNN about Singulair. After finding this website the next morning I was horrified - and she has not taken it since. Our allergist dismissed the CNN story, saying there was no scientific evidence to support that claim, but agreed that maybe we should take her off Singulair. We did visit a therapist, although since that day I have seen a noticeable change in her behavior and moods. If anyone else is considering a class action suit, please email me since I am seriously planning to take some kind of action - I believe the FDA should move quickly on this so that other parents may be able to avoid seeing their children have to deal with the effects of this medication. I could probably write pages, I am so appalled that this has happened, but I will end here for now....

I started taking Singulair about a year and half ago. Six months ago I started having muscles twitching in legs and arms as well as other parts of my body. I have had 2 EMG's ans 3 MRI's and the doctors can not find any reason for the problems. I also have some muscle weakness in arms and cramps in the lower legs. Has anyone else had this type of reaction while taking Singulair? Please report if you have.