What's the Maximum Amount for 11s?

I like to "nuke" the 11's for a new patient.  Using a HA filler like Juvederm or Restylane along with the Botox can give you a running start.  Fillers work for a long time when done in concert with Botox, because the muscular action isn't "milking" the filler out of the area.  Unit wise, 20 plus 15 plus 10 sounds like a lot.  Watch your brow position, as extravisated Botox can cause problems in adjacent muscles!

Hi Avion.  It sounds like you have more than enough to relax the muscles in this area.  Even if you had extremely developed muscles, 50 units is a lot and should have done the trick.  

If you cannot animate (move or contract) the muscles that cause the frown, then you do not need more Botox and your injector needs to think more about a dermal filler like Restylane.  If you are not able to move the muscles and your injector has not already suggested a dermal filler like Restylane, then you may need to start looking for a new injector as this is a fairly common issue.

You might need more Botox if you are a man.  Some men need up to 60 units in the glabellar ("11") area between the eyebrows.  But, you mentioned your touch-ups were only 1 week apart and it can sometimes take up to 2 weeks for all of the effect to "kick in".  So if you just had your 2nd touch up you need to wait 2 weeks afterwards to see the full effect.  That being said, if you can't move it at all but see furrows you might need some filler, such as Juvederm or Restylane, in that area in addtion to the Botox.  In my practice 95% of my patients with lines in that area can get complete smoothing with just Botox but that other 5% also needs a filler.

You also would want to see if you got Botox Cosmetic vs. Dysport.  Dysport is a botulinum toxin that is measured differently and 50 units of that equals only 16- 20 units of Botox Cosmetic.