Does a doctor have to tell you if they administer Xeomin instead of Botox?

Both Botox and Xeomin are botulinum toxin A products. There are slight differences but clinically, these differences are meaningless. Which one of the products you receive is meaningless because clinically these is no distinction. They are entirely interchangeable not matter what company representatives want doctors to believe.

Hi!

As a patient it is important to know what is being administered to you. A doctor or provider should always make you aware of what is being injected into your face. I would say, make sure you clarify with your provider which product is being used prior to injection for your own knowledge. It is important to know in case of a reaction for other providers, as well as your own personal preference as to what you like more!

Thank you for your question. Absolutely, 100% yes. Both are neuromodulators, true, but they have different costs and very slight differences. Moreover, you have the right to know what products you're being treated with.
Best,
-Dr. P