Can Botox Cause Chronic Idiopathic Urticaria?

Although neither I nor any colleagues of mine with whom I have discussed Botox, have ever known a cases of hives secondary to the Botox treatment.  You may, however, ask your allergist to do a skin prick test to the botox and your doctor can supply the allergist with the botox in a syringe diluted with the same liquid they used on you. It would be doubtfuly, but possibly a preservative in the liquid has caused the hives. It would be very rare that this reaction would occur weeks later and last a while, so I don't think it is the cause of your chronic urticaria.

Gina

I would advise caution in having BOTOX in the future.  Allergies to BOTOX and the agents in the BOTOX preparation are rare but can occur.  I think if you are interested in having BOTOX in the future, a skin test with a tiny amount of BOTOX on the forearm would be appropriate.  If you react, I cannot advise future treatment.  If you feel that you must have BOTOX treatment in the future, you might consider a consultation with an allergist.

Dear Gina,

Chronic idiopathic urticaria [CIU] is a common codition. The cause remains elusive in the majority of cases , even after an exhaustive work up. I have not seen a single case of urticaria related to botox in 16 years of using botox. By contrast , I see an average of 2-3 cases of CIU every week, in my practice.

I do not think Botox is what caused your CIU. However there is no conclusive test that can confirm, [or rule out] the causation. Skin tests are NOT helpful in cases of urticaria.

My advise is to carry on with your Botox treatments. 

I very much doubt your Botox had anything to do with your hives and breakout. Any type of reaction to Botox would have been much more immediate and would have happened the additional times you received the treatment. It's merely a coincidence these were done within weeks of each other and in my opinion, not at all related.