Has anyone ever had an allergic reaction to advair that too after about five months? Take my example, I started taking advair for my asthma in September and up to January I seemed to be fine. Then I noticed some hives on my body which was spreading all over. On consulting my doctor I was told that I was having an allergic reaction to something and prescribed some allergy medications for me. It was supposed to subside in a few weeks but it's been 3 months now and I'm still carrying it. Could it be the advair I wonder? I'm contemplating stopping the medicine but even then it'll take another 3 months to leave my system.