Can Botox masseter wear off in two weeks?

Hello and thanks for the question.Massater  muscle is very strong and sometimes addtional units may be needed. You should be reevaluated to see what are the causes and possible treatment options exist.Best,

Our masseter muscles are much stronger than most of the muscles that Botox treats and therefore require larger doses. If you don’t think the Botox is working for you, go back to your injector for another dose. Most dermatologists would rather err on the side of caution than give too much of any product. It’s always easier to add more than to wait for effects to diminish. If this is your first time being treated, then your effective dose is just being established.

The standard range for treatment of the Masseters ranges from a total of 50-100 units and so you were treated very conservatively.  I personally find that most patients need at least 80 units to achieve effective results and so would suggest that you ask for more units with your next treatment. I hope that helps and wish you the very best!Warmest regards,Gregory A Buford MD FACSBoard Certified Plastic Surgeon and Author

Dear fuentescristina,Botox is generally an on off switch for muscle activity. Most of patients see first changes after 4-7 days and the final results after 10-14 days. It depends on the amount of Botox and area where it is injected but it usually last for 3-4 months. If you are concerned about the results of your previous injections, I would suggest you to discuss it with your plastic surgeon. Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery

Masseter Botox should not be effective at one and half weeks and ineffective at two weeks. I encourage you to return to your injector for an evaluation. Generally Botox effects will wear off gradually over three to four months. The number of units you mentioned is a typical starting dose. You may need a touch up for better results.

Thank you for your question. The masseter muscles are very strong and you may require additional units. I like to start with 20-30 units of Botox per each masseter muscle. It typically takes up to 2 weeks to see full results of Botox. I recommend having a follow up with your injector for an evaluation and to discuss your concerns. Best of Luck!

The injections may have a variable effect depending on the number of units used, areas of the muscle injected as well as the dilution used. You should follow up with your surgeon and discuss your concerns for possible repeat treatment.

It sounds like you were not given enough Botox to weaken your masseters sufficiently. They’re strong muscles. Botox should relax the masseter muscle for about six months. Please go back to your  board-certified dermatologist for another dose. You may have an adjustment period while you figure out your ideal number of units.

This is not typical as the results of Botox/Dysport usually last 3-4 months on average. I would followup with your injector to discuss your results. I usually start with 20-30 units of Botox or an equivalent amount of Dysport per masseter muscle. 

Thanks for your question. Botox is injected into the masseter muscles for two main reasons. The first is for people with chronic jaw clenching who end up with TMJ problems. The second is for people who wish to have a more slender jawline for aesthetic reasons. The dosing for each is about the same. In any case, it's a little strange that after almost two weeks of good effect you all of a sudden have lost it. However, after two weeks I routinely see my Botox patients, particularly the ones for masseters, to make sure that the effect is good, judged by both symptoms and movement. If you were my patient, we'd just give more until you can't feel that muscle flex under the surface. Good luck!