How Many Botox Units for 11's or Frown Lines?

I received 20 units of Botox yesterday. Now I think I may have been cheated, he just wanted to get his $256 and the 20 units he injected were not nearly enough to get "rid" of the moderate/severe "11's" on my forehead. What is the average amount of units needed for this?

Doctor Answers 180

Botox today gone tomorrow.

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You seem to have a real distrust for your injecting physician. There is no reason for a practitioner to "cheat" you. The effects of Botox are temporary, lasting only 3 or 4 months, so you will undoubtedly need future treatments. Your injector certainly wants you to be a satisfied customer, to keep you coming back for more treatments. Don't be so skeptical, trust your physician, especially if he/she is a board certified plastic surgeon. Twenty units is a perfectly reasonable amount for your frown line area and may take up to a week to take effect.

Botox takes several days to start working

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I can understand your frustration. However, you state that you just had the Botox yesterday. It will take 3 to 7 stays for it to start working and sometimes up to 2 weeks for the final effect. So, please be patient to see the effect.

However, it does usually take between 20 to 30 units for the glabella (your "11's") area. It takes another 15 to 25 units for your forehead and another 2.5 to 5 units for around each eye (crow's feet).

I hope this is helpful.

How Much Botox for 11's (Frown Lines)

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The amount of Botox required for treatment of the 11's depends on the amount of "muscle mass" you have between the brows. It stands to reason that it takes more Botox to treat a larger muscle than a smaller one. I have the patient frown as harshly as possible to determine both the direction of the frown muscles and their relative size. Small frown muscles generally require no more than 20 units. Men and some women with larger muscles may require between 25 and 30 units of Botox.  In some patients, secondary muscles, such as the muscles around the eye, can also contribute to the formation of frown lines. This is often referred to as "recruitment" and can require an additional 10-15 units of Botox.

As mentioned by others, it takes 3-5 days for Botox work in most patients. 

Brock Ridenour, MD
Saint Louis Facial Plastic Surgeon
5.0 out of 5 stars 126 reviews

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One day after injection is not enough time to see Botox results.

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If you just received your Botox injection yesterday, you would not expect to see any results yet as it has only been one day since your treatment. To see the effects of the Botox it takes on average 3-5 days from the injection day. The complete results are usually noted at about 7 days.

The average amount of Botox used for the “11” lines between the eyebrows is around 20-25 units for a female. Males will usually require more units as their facial muscles are often thicker and stronger. Ultimately the number of units you need depends on the size and strength of your corrugator muscles.

We tell our patients to call us between 10-14 days if there is any question as to their results. We will then bring them back in for after pictures to compare the results and perform a touch-up procedure if necessary.

Dan Mills, MD
Orange County Plastic Surgeon
4.8 out of 5 stars 35 reviews

It depends on the strength of your 11's

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The 11's are formed by a muscle called the corrugator that extends, on both sides, from about midbrow to the area between the brows. See link below.

For patients with strong muscles and deep lines, I will use as much as 12 units total for the central part of the corrugator muscles and 8 additional units at the lateral end of the muscle (total of 20 units). I do believe it is important to treat both ends of the muscle to get the best effect.

For a younger patient with weaker muscles and less deep lines, 8 units centrally and 2 units laterally on each side (total of 12 units) is usually sufficient. 

Anand D. Patel, MD
Brookfield Facial Plastic Surgeon
5.0 out of 5 stars 23 reviews

Botox injection for forhead

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It may take up to two weeks to have the full effect of the Botox on your  frown lines. You will most likely see more improvement

If you can still re-create the lines, all it means is that you either needed more units of Botox injected or you did not have it injected in the right location.

I routinely see patients two weeks post injection to determine if a "touch up" is needed and also to learn how I can do it better for that particular patient the next time.

Best wishes,

Dr. Sajjadian

Ali Sajjadian, MD, FACS
Orange County Plastic Surgeon
5.0 out of 5 stars 205 reviews

Botox 25 to 30 Units is Best Frown Line or 11's Treatment

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Wait two weeks to evaluate your Botox result. If after two weeks yiou see nothing go back and see your doctor. It takes at least 4 days to see a result after Botox treatment.

I have had many patients respond well to 15-20 Units of Botox. However in patients with thicker skin and large muscle and in patients who have had Botox before I now use 25-30 Units for best effect.


Yesterday? Botox doesn't work that fast!

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Botox takes several days to start to kick in and the maximal results are seen in 7-10 days. If you got it yesterday it is waay to early to judge if it is too much or too little. Any effect you see today is probably largely placebo effect.

Chris Thiagarajah, MD
Denver Oculoplastic Surgeon

How Much Botox Do You Need for Your Frown Lines ("elevens")

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Most people require anywhere from 20-30 units of Botox for the frown lines.  The glabellar complex which is involved in forming the frown lines (the "11s") encompasses a strong group of muscles between the eyebrows that are constantly being utilized (eg. frowning, thinking, working on your computer, dreaming, squinting in the sun, etc) so it is important to have an adequate amount of Botox for a satisfactory treatment.  Also, keep in mind that it does take Botox anywhere form 7-14 days to take full effect, and if it has only been a day since your treatment so you have to give it time to work. 

With the above said, it is of course important to consult with an experienced and expert physician injector to ensure that you are getting genuine botox and an appropriate treatment.  

-Dr. Sunanda Chugh, NYC

Botox units for 11 lines

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As you just had it you will not see the results for 10 to 14 days and in addition the first few times the lines do not diminish much they just don't get deeper with a frown.  It takes a year or more for the wrinkles to remodel with collagen and this only happens if you continento get the Botox frequently around every 3 months. 20 units seems like a reasonable starting point. I usually have my new patients come back after 2 weeks to increase the dosage if necessary.

Katrinka L. Heher, MD
Boston Oculoplastic Surgeon
5.0 out of 5 stars 8 reviews

These answers are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.