Only one injection for 20 units of botox?

I routinely inject 20-25 units in the Glabella and Procerus muscles; It is possible to inject both these muscles from one injection point but this is not the norm; Most injectors use several injection points to achieve optimal results.  

Hello, this is not the standard practice for injecting Botox. There are muscles you need to target in the Glabellar region, a single injection will not do this. In addition to this, 20U of Botox is on the low side and the risk is that it will not lost very long. I posted an article about this below. Dr Bonaparte