I had an injection of dysport on Dec. 1. I have had hives. I have taken benedryl and zyrtec. When I try to stop, the hives come back. Has anyone had this happen to them? How long did the hives last. Also, I have arthymia and my heart beats quicker. When I take the benedryl and zyrtec, my blood pressure goes up. I am 69 years old. I have had botox and have had no reaction.
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