I am not a 100% sure the experience I had was due to Singulair bu...

I am not a 100% sure the experience I had was due to Singulair but it appears to be. Singulair was prescribed to me for "walking pnemonia". After a couple of days on the medications I was taking, I started experiencing pain in my knees and muscles in my lower legs. My left leg was worse than my right. After 3 days, I could barely walk and the pain was severe. I forgot to take my medicine one day and the next day my knees were much better and had less pain. I just thought I was getting better but the next day when I started the medicine again, the pain came back. I remembered when my son was on Accutane he had similar knee and leg pain because of the dryness caused by Accutane. So I kept taking the antibiotic I was on and stopped the Singulair. The next day I felt much better. On the second day I hardly had any pain at all. I was curious if anyone else had this type of side effect. Most of the postings I have seen have dealt more with depression in teenagers. I am 55.