Is there a way to test if you will have a hypersensitive reaction to Botox prior to having the full amount injected?

Thank you for your question.  The risk of an allergic reaction to Botox is very small and if you never had it placed before it is unlikely to elicit a hypersensitivity response.  Its effectiveness or a possible complication is more dependent on the injector and their experience with administration.  Hope this helps. 

Although there is a risk of an allergic reaction to Botox (and the other botulinum toxins, Xeomin and Dysport), this risk is extremely low and I would venture to say that almost no practitioners who regularly inject Botox have ever seen an instance of a true allergic reaction to Botox. The symptoms of an allergic reaction would be rash, red itchy welts and could even be more significant such as wheezing and asthma symptoms. As I said these risks are very low and it is not necessary to do any kind of testing beforehand. However, if you are still concerned, there is no reason why a small amount of botox couldn't be injected prior to a full treatment. You just wouldn't have the cosmetic benefit from this treatment and it really is unnecessary. If you were going to have an allergic reaction you should have it from that small dose. It is important however to differentiate between adverse reaction and allergic reaction. There are other side effects or adverse reactions that you should be aware of, most all of which can be reduced or eliminated by going to an experienced injector. For this reason, I recommend that you seek out a qualified injector that you feel comfortable with. They can go over side effects and get you the best cosmetic result. Botox is a very safe treatment that can give you excellent results when in the right hands.

It is rare to have a hypersensitivity reaction to Botox.  You can have the product skin tested ahead of time if you are concerned.  Best, Dr. Green

The risk of allergic reaction to Botox is very low.  I personally have never seen a serious reaction to Botox with almost two decades of use.  You could consider Xeomin instead of Botox since Xeomin is a more purified product without some of the other ingredients that are in Botox.  However, the bottom line is that use of any of these products is elective and if you have concerns regarding safety or potential reactions, it might be best for you not to have these elective treatments done.  Regards,Dr. Ort

Hypersensitivity to Botox and the other neurotoxins is very uncommon.  However, it is possible to do a "skin test" to determine if a person might have a reaction.  Historically, collagen products required a test dose prior to full treatment.   Though not very common, skin testing can also be done with Botox, Xeomin, and Dysport.