I've been on Singulair for more than a few years now. I'm 43, with exercise and allergy induced asthma.....but mild. I also have VERY bad allergies. Talk about being allergic to EVERYTHING outside....that's me. I also suffer from migraines and depression. I've been on every antidepressant out there....still depressed. Now I know why...Singulair. I've tried tons of migraine meds....and I'm wondering if some of my side effects are really from Singulair. I'm moody, I don't care about other people's feelings like I used to, I snap at my kids like crazy,I cry at the drop of a hat....at stupid stuff. And now I'm thinking that my joint pain in my hips is from Singulair. But Singulair was my miracle drug for my asthma and a huge help to my Allegra D for my allergies. I'm asking the doc for an alturnative drug. As soon as I get it I'm off Singulair. ADIOS!