I've been taking Singulair for about a year and a half. Last sum...

I've been taking Singulair for about a year and a half. Last summer I mentioned horrible leg and foot cramps to my pulmonary doctor who I see twice a year for asthma. They claimed that they had never heard of cramps from this drug. I tried everything from going off from my estrogen to drinking extra o.j. and eating more bananas. Nothing changed; but without the singulair I have severe burning in my upper back all the time. In November I returned for my doctor visit and was told that they had done some research on the leg and foot cramps and that it is considered a side effect. I was changed to Accolate which is not a drug my insurance company accepts. The leg cramps went away but the burning in my back was so severe from the asthma that I returned to using Singulair. I now have such awful leg and foot cramps that I spend several times a night walking my house. I've also been told that the pain and burning in my back should not be associated with the asthma and the doctor cannot explain why the singulair helps with this but it does and I'm afraid to stop. I'm very torn between the cramps and back burning. Theresa Michigan