As a physician and oculoplastic surgeon, I have ben injecting Botox for close to 20 years. It is definitely an art and you have to be well versed in the anatomy and physiology of the related muscles.
Having said that, Botox can be injected by a physician, nurse or physician assistant. I have personally trained a P.A. (physician assistant) in my practice 8 years ago who also is my wife and she is very competent as well. Physicain assistants are licensed to practice medicine under the supervision of a doctor.
As her supervising physician, I would not allow her to inject if I didn't think it was safe or would put my patients in jeopardy in any way.
Be sure whomever you go to has been properly trained and has alot of experience with Botox.



