What is different about neuromodulator treatment for men?
The drug and the way it works are the same for men and women. The differences are in the muscles and the goals. Men generally have larger facial muscles, and studies of men's frown lines found better responses at higher doses than the labeled one. Men's brows also sit lower, which changes where the forehead can safely be treated. Any dose is set at a consultation, not in advance.
The same drug, different muscles
A neuromodulator works the same way in every patient. It blocks the nerve signal that makes the injected muscle contract, the muscle moves less, and the line it creates softens for a period of months. How neuromodulators work.
What differs for many men is the anatomy the drug is placed into and what they want the result to look like. a 2015 review of male facial anatomy reports that facial muscle mass, subcutaneous tissue and blood vessel density are greater in men, and that technique not adapted to a male patient can feminize facial features (source, verified ). Those two facts shape the dose, where the injections go, and how the brow is protected.
What the FDA trials say about men
The labeled doses were set in trials that enrolled mostly women. in the two Botox Cosmetic glabellar line efficacy studies, 82% of subjects were women (source, verified ). in Dysport's glabellar line study GL-1, subjects received 50 Units in five aliquots of 10 Units, and 85% of subjects were women (source, verified ).
The Botox Cosmetic label also reports one comparison by sex: in its frown line trials, fewer men than women were rated as responders a month after treatment (the figures are in the Numbers box below). The label calls these analyses exploratory, and the number of men was small, so the result is a signal rather than a firm finding. It is consistent, though, with what the dose study below found.
Dose: what studies of men found
The labeled dose for frown lines was set in the mostly female trials above. One trial looked only at men. a 2005 randomized, double-blind study gave 80 men a total glabellar dose of 20, 40, 60 or 80 Units of onabotulinumtoxinA; the 40, 60 and 80 Unit doses were consistently more effective than 20 Units in duration, peak response rate and improvement from baseline, and adverse events did not increase at the higher doses (source, verified ). Its authors drew a conclusion about starting doses for men, shown in the Numbers box. An expert consensus on forehead treatment reached a similar view. a 2017 expert consensus on the forehead states that men typically have greater muscle mass and a larger forehead surface area than women and require higher doses, and it gives separate injection protocols for men and women; the consensus was funded by Merz, the maker of Xeomin (source, verified ).
Two cautions sit beside these figures. First, they are study doses for study populations, not a recommended dose for any one man; the label says an effective dose is judged by watching how strongly the patient can activate the muscles to be treated. Second, a dose above the label is a prescriber’s decision, made for a reason and explained to you. Units are also brand-specific, so a number only means something with the product name beside it (why units differ between brands).
Label dose for frown lines: the Botox Cosmetic label doses glabellar lines at 4 Units into each of 5 sites, two in each corrugator muscle and one in the procerus, for a total of 20 Units (source, verified ). Men-only study: the study's authors concluded that men with glabellar lines benefit from starting doses of at least 40 Units of onabotulinumtoxinA, twice the labeled 20 Unit dose (source, verified ). Response by sex in the label trials: exploratory analyses by gender in those studies found lower day-30 responder rates in men than in women, 59% of 71 men against 85% of 334 women on the investigator assessment, and 72% against 93% on the subjects' own assessment (source, verified ).
The brow and the forehead
The forehead is where differences in anatomy matter most. The frontalis is the muscle that lifts the brows and creates horizontal forehead lines. If its lowest fibers are relaxed too much, the brow loses some of its support and can drop.
the same consensus notes that eyebrows sit naturally lower in men, that excessive relaxation of the lower frontalis can cause brow ptosis, and that the point where the two frontalis muscles diverge is generally lower in men (source, verified ). Because the brow already sits lower, there is less room for error above it.
The label and the consensus both build distance from the brow into the plan. to reduce the risk of ptosis, the Botox Cosmetic label says to place lateral corrugator injections at least 1 cm above the bony supraorbital ridge and not to inject closer than 1 cm above the central eyebrow (source, verified ). the consensus placed its forehead injection zones 1.5 to 2.0 cm above the eyebrow to avoid brow ptosis (source, verified ). the Botox Cosmetic label says to treat forehead lines together with glabellar lines to minimize the potential for brow ptosis, 20 Units in the frontalis plus 20 Units in the glabella for a total of 40 Units (source, verified ). Even with that care, brow ptosis was reported in 2% of subjects in the Botox Cosmetic forehead line studies (source, verified ). A heavy or dropped brow wears off as the treatment does, but it is the outcome the planning is designed to prevent.
What men often want from treatment
Goals are personal, and no list fits everyone. Two themes come up in the literature on male patients. The first is keeping the face looking like itself: the anatomy review above warns that technique not adapted to a man’s face can feminize it, so a plan copied from one patient to another can change brow shape or expression in a way the patient did not want. The second is keeping expression. the consensus describes the main goal of aesthetic botulinum toxin treatment as balancing dynamic wrinkles against maintaining natural facial animation (source, verified ).
If you want to keep some forehead movement, keep a straight brow, or avoid a surprised look, say so at the start. Those preferences change where and how much is injected.
How often men are treated
Surveys show men are a minority of neuromodulator patients, but not a small one. in the ISAPS survey of procedures performed by plastic surgeons worldwide in 2024, botulinum toxin was the most common non-surgical procedure for men, at an estimated 1,265,482 procedures, 16.0% of all botulinum toxin procedures (source, verified ). The survey counts procedures reported by plastic surgeons only, not by nurse injectors or other providers, so it describes a share of the field rather than every treatment given.
What the consultation covers
Tanya practices under a delegating prescriber, and a new patient in Arizona has a Good Faith Exam with a prescriber before the first treatment (what a Good Faith Exam is). The consultation covers the same ground for every patient, with the points above in mind:
- What bothers you. Which lines, and whether they show only when you move or also at rest.
- How your muscles move. Frowning, raising the brows and squinting, watched and felt rather than estimated.
- Your brow. Where it sits now, whether one side is lower, and how much the forehead is working to hold it up.
- History. Previous treatments with product, units and dates if you know them, your medicines, and any neuromuscular condition, which the labels list as a reason for caution.
- The plan. Which muscles, which product, how many units and why, including anything outside the label.
No dose or result is settled before that conversation and the exam. How long the effect lasts.
Limits of the evidence
The men-only dose study was small and tested one product in one area. The label’s comparison by sex was exploratory. The forehead consensus is expert opinion rather than a trial, and it was funded by a manufacturer. None of these sources compared products in men head to head. Taken together they support a modest conclusion: men often need more product in strong muscles, and the male brow needs particular care. They do not tell any one man what dose he will need or how long it will last.
Sources
- BOTOX Cosmetic (onabotulinumtoxinA) for injection, Prescribing Information (revised 10/2024) , AbbVie Manufacturer Accessed
- DYSPORT (abobotulinumtoxinA) for injection, Prescribing Information (revised 1/2023) , U.S. Food and Drug Administration Regulator Accessed
- Prospective, double-blind, randomized, parallel-group, dose-ranging study of botulinum toxin type A in men with glabellar rhytids , Dermatologic Surgery (PubMed) Peer-reviewed Accessed
- Male Aesthetics, A Review of Facial Anatomy and Pertinent Clinical Implications , Journal of Drugs in Dermatology (PubMed) Peer-reviewed Accessed
- Tailored botulinum toxin type A injections in aesthetic medicine, consensus panel recommendations for treating the forehead based on individual facial anatomy and muscle tone , Clinical, Cosmetic and Investigational Dermatology (PubMed Central) Peer-reviewed Accessed
- ISAPS International Survey on Aesthetic/Cosmetic Procedures Performed in 2024 , International Society of Aesthetic Plastic Surgery Accessed
Questions readers ask
Does every man need a higher dose than the label?
No. The studies describe groups, and muscle strength varies widely between individual men as it does between women. The label itself says an effective dose is judged by watching how strongly the patient can move the muscles being treated, which is why the plan is made after an examination rather than from a chart.
Will treatment make my brows look raised or arched?
That is a result planning tries to avoid, and it is worth saying at the start that you want to keep the brow shape you have now. Where the forehead and brow muscles are treated, and how much goes into each spot, decides how the brow sits afterwards.
Can I keep some movement in my forehead?
Yes, and many people ask for exactly that. A softer result uses less product in the forehead and leaves the face able to show surprise or concern. The trade-off is that some fine lines stay visible when you move.
Is a dose above the label off-label?
The label sets the studied dose for each approved area, and treating at a different dose or in an area outside the label is a decision for the prescriber. Ask which parts of your plan follow the label and which do not, and why.
Can I be treated on my first visit?
In Arizona a new patient first has a Good Faith Exam with a prescriber. Many practices arrange that exam as part of the first appointment, so treatment can follow the same day when you are cleared, but it is never assumed in advance.
Revision history (1)
- update First version, written from FDA prescribing information and peer-reviewed literature Editorial team