Dear I. You are obviously struggling with your urticaria judging by the number of posts you place on this website. Chronic Urticaria can persist for years (you have had it 2.5 months). Ask your GP to prescribe a short course oral prednisone, but keep taking the high dosages of antihistamine. Cimetidine and Montelukast are probably ineffective and your doctor could consider stopping them.
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