Nurse Practitioners can inject Botox®, however since Botox is a controlled substance your State may require that you work with a physician to do it. First, you should consult with your State nursing board as they will know the latest rules because they do change from time to time. Basically, if you can currently prescribe (controlled) drugs, you can most likely offer Botox® to your current patients without having a medical director. The infographic shows you quickly the 13 states that allow you to prescribe botox without having a physician present.
Infographic Source: http://1uuorq398khs3hsomdugq7ri.wpengine.netdna-cdn.com/