two weeks ago, I had a severe attach of GERD, never had it before. I am 63. 4 days later I had mild gerd and severe hives. I got decadron shot then 6 days of prednisone 60mg, 50, 40 etc. 5 days ago I had severe gerd. other days it has been very mild, but still noticeable . I m on my 9th dose of omeprezole 40mg. still mild gerd, but I still get hives attacks...Allegra will reduce it after 3-5 hours. Should I take an H2-antihistimine instead. I have no health problem, it s not my heart. This GERD/Hives just hit me over the past two weeks...never had a problem with either