Was rushed to emergency after Botox injection for frown lines. Now have terrible side effects. How long will they last?

These side effects are extremely rare. I recommend following up with your Doctor for treatment. Botox results resolve in 3-4 months. Best, Dr. Emer

I would not recommend getting more botox.  I also would advise against getting any of the cosmetic botulinum toxin products including Xeomin, Dysport, or Myobloc.  If there is a compelling medical reason, an allergist could do detailed testing to determine what in the Botox product you reacted to.  It is possible you responded to the botulinum toxin proteins, or the albumin in the product. In the absence of a medical need to get botox, just avoid these products.  This seems to be a 1 in 500,000 event.

Dear pauline55:
This is an extremely unusual event. A preservative used to dilute the Botox is alctually more likely than the Botox itself, and, of course, you did not provide a complete history but it is even possible that something else was the cause. You will want to consult an allergist as an outpatient and work with your dermatologist and Allergan, the maker of Botox, to tease out exactly what you are allergic to. Anaphylactic reactions often leave people feeling very wiped out. The Botox molecules themselves have been cleared from your body and you should begin to feel better very soon, of not already.
All the best,  Dr, Clark