Common dose of Botox (not Dysport) for injection in the masseter?

The masseter is a very bulky muscle, and so it does require a higher dose of Botox to relax it than the dosages typically used to treat the muscles of facial expression.  A very typical starting dose is 25 units/side.  This will achieve full treatment in about 80% of patients.  

Thank you for your question. Botox or Dysport can be a very effective way to contour the jaw line by reducing the masseter shadow through the outer jaw skin. In addition, it can reduce symptoms of jaw clenching or grinding of teeth at night time. This is an advanced technique that requires a strong understanding of the underlying anatomy. Some side effects can results in some very unintented effects. This can include affecting the smile due to diffusion of the Botox into neighboring smile muscles. Over treatment can also overweaken your jaw muscles making it harder to chew food and causes your jaw muscles to relax too much when you sleep.The injection technique does vary by physical exam and the goals of the treatment. Facial contouring goals may change the injection sites themselves to affect different portions of the masseter as well as the dose. The strength of the masseters can be felt by palpation and also helps me to determine dosing. In general, I start with 15- 25 units of Botox (OR 50-75 units of Dysport) per side for most patients. If the have very strong masseters, then I may increase the dose, but more commonly ask them to return in three weeks for a touch up. Once you get the desired result, I let patients know that future treatments may require less to maintain the look or the jaw clenching symptoms, especially if they get treated as soon as they notice the symptoms return. This can be as soon as three to four months, but in some cases, patients report that it lasts six months or more. I find it depends on the dose we use and how many times we have done the procedure as the duration may lengthen for patients that repeat it regularly.

Botox is great in treating strong masseters and, in experienced hands, no specific additional equipment is really needed. Without seeing your face and examining you, it is difficult to estimate the best dose of Botox but, in General it can vary from 15 to 40 units per side. It just depends how strong and big the muscle is.I hope that helps

The masseter is a strong and powerful muscle, so it will typically require more Botox to get the desired effect.  If you suffer from bruxism and masseter spasm, you surely have a very
well-developed and large masseter, and you may require even higher dosing
than the typical range.   Your doctor is right that 10 units is probably too low of a dose.If you are worried, you can always start with a lower dose and add more later.  This may give you some peace of mind.  Once you find the amount that works for you, your doctor can repeat that dosing in the future.  With masseter injections, weakness often lasts for six or even nine months.

Without examining you, it is difficult to state the number of units required.  The dosage to minimize the masseter muscles ranges from 15 to 40 units per side.

Each injector has his or her own injection techniques. The norm is 10 to 40 units for masseter muscle reduction. Consult with 3 experienced and expert physician injectors to understand your options.

Thank you for your question.Botox could be injected regularly and in modest dosed 15-40 units to achieve masseter muscle reduction. This is better than huge bolus doses. Best,Dr. Karamanoukian

The masseter is a pretty strong muscle that gets regular work-outs with chewing, and in some people, teeth-grinding.  I usually start with 15-20 units Botox per side when treating the masseter, and at times, retreat with a similar dose 3-4 weeks later, depending on patient response.  Factors such as gender, previous experience with Botox, and muscle strength on exam all factor in the treatment dosing decision.There's no harm in trying a smaller dose than your physician recommends; however, you must do so with the clear understanding that Botox provides a dose-dependent response.  If you underdose a muscle and don't see much response, typically this means more Botox is needed--not that the medication "didn't take."  Good luck!