About 3 1/2 weeks I had 100 units of botox (50 each side) injected into my masseter muscles. The muscle has definitely gotten softer (When I clench my teeth), but I don't see any reduction in muscle size yet. I just went in for my follow up appt w/ the doctor, and he suggested I should be seeing results by now, although all online sources say 4-8 weeks is when you see results. So, how long does it usually take for masseter botox to start shrinking the muscle?
Answer
This takes 3-6 weeks to see the full effect. Often 30-60 units per side are needed and even more if the end result is even further contouring. I wait 3-6 weeks and then reassess the need for more. Before and after pictures best tell if there is a change. Best, Dr. Emer.
Dr. Jason Emer, MD
Board Certified Plastic Surgeon
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It is better to go slowly when treating the Masseter to achieve consistent, symmmetrical results. Secondary treatment with decreased dose may do the trick. Stay patient and Good luck!
Dr. Robert M. Tornambe, MD
Board Certified Plastic Surgeon
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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.I would definitely take before and after pictures to assess the visual effect as it is hard to appreciate the change from one day to the next. It would also be great to share them online if you are comfortable as it might help us give more insight as to why it didn't work.
Dr. Young R. Cho, MD, PhD
Board Certified Plastic Surgeon
Answer
The first time injection of Botox will soften the masseter muscle but will not necessarily reduce it in its size. As you keep repeating it over years eventually the size of the muscle will reduce from atrophy of the muscle.Even after the first time you will see some improvement within 2-3 months.RegardsDr. J
Dr. Tanveer Janjua, MD
Board Certified Plastic Surgeon
Answer
Unlike regular wrinkle injections, the effect of injections in the masseters takes about 4-6 weeks before you see the difference and typically last between 4-6months before needing another treatment.
