Was taking Allegra for 5 yrs with no problem but on advice from m...

Was taking Allegra for 5 yrs with no problem but on advice from my Dr. switched to Singulair for about 10 months . Had good results but started to notice that I had no energgy and wanted to sleep most of the day but at night had no luck getting to sleep. Stopped taking Singulair for a couple of weeks and noticed that I was feeling better than I got stuffed up with pollen heavy in the air and took a Singulair. The next dayWOOO had no energy must have slept 5 hrs. during the day,that cured me of that medication. Feel good now