How many units of botox do I need to reduce my jawline? (photo)

For Botox, 25 units on each side (for a total of 50 units) is a good starting dose.  Most patients will have nice relaxation of their muscles.  When administered properly, this dosage will not cause any "facial deformity".  Especially for a first time treatment, a percentage of patients will need additional units to achieve full relaxation and maximal jaw tapering.  

Thank you for your question. Botox in the masseter region usually takes longer than in the standard areas to take effect. I tend to use anywhere from 15 units (conservative treatment) to 50 units (for someone with really strong masseters) on each side to get the desired result. It may start within the first week but I tell my patients to wait three weeks before doing a more thorough evaluation. The treatment typically lasts longer than the forehead/crows feet/frown regions. It is also a gradual onset of the return of masseter function. I have tried the masseter injections myself and space the treatments around 4 months apart, but use smaller doses to maintain the effect. I normally know the effects are wearing down when I start to clench my teeth more heavily at night when asleep. Once you stop using Botox, the masseter muscles will return to their original baseline when the effects of Botox wears off completely.

It's very difficult to answer your question - depending on how much of a reduction you are expecting, that will determine the number of units and treatment to discuss with your provider.