In aesthetic medicine, a neuromodulator, also called a wrinkle relaxer, is a prescription injection of botulinum toxin type A that temporarily relaxes the small facial muscles that fold the skin into lines when you frown, squint, or raise your brows. Botox Cosmetic, Daxxify, and Jeuveau are all neuromodulators. Neurotoxin is a third name for the same class, and many people call the whole category “Botox” after the brand that came first.
Neuromodulators at a glance
What it is: A wrinkle relaxer: botulinum toxin type A, a prescription medicine measured in units and injected in small doses into specific facial muscles.
How it works: It blocks the signal a nerve sends to a muscle, so the muscle relaxes and the skin above it stops creasing.
What it treats: Lines made by movement: frown lines, crow’s feet, forehead lines, and vertical neck bands.
What it does not treat: Lost volume, loose skin, and skin texture. Those call for fillers, a biostimulator, or a skin treatment.
When you see it: Most people see a change within three to seven days. We review the result with you at two weeks.
How long it lasts: About three to four months for frown lines. Timing varies by person, area, and dose.
How often: Retreatment no sooner than three months.
At Savage Serenity: Botox Cosmetic, Daxxify, and Jeuveau, injected by Angela Hash, BSN, RN, Michelle Perkins, RN, or Candice Brantley, NP. Medical director: Dr. Luis Lee.
What a neuromodulator is, and why it is called a wrinkle relaxer
A neuromodulator is a medicine that changes how a nerve talks to a muscle. The ones used in aesthetics are made from botulinum toxin type A, a purified protein that is formulated as a prescription drug, measured in units, and injected with a very fine needle into the muscle that makes a particular line.
The name confuses people, because in other parts of medicine a neuromodulator can mean a chemical in the nervous system or an implanted device. On an aesthetic menu it means one thing: a wrinkle relaxing injection, which is why wrinkle relaxer is the plainer name for the same treatment. You will also see neurotoxin or tox, and you will hear “Botox” used for all of them, the way a brand name sometimes stands in for a whole category.
The medicine has a long history. Botulinum toxin was prescribed for medical conditions for years before the first cosmetic approval, for frown lines, arrived in April 2002. Every product in the class since then rests on the same principle: a temporary improvement in the appearance of lines caused by muscle movement.
How a neuromodulator works
A neuromodulator works by interrupting the signal between a nerve and the muscle it controls. When you frown, a nerve ending releases a chemical messenger called acetylcholine, the muscle contracts, and the skin above it folds. A neuromodulator binds to the nerve ending and stops that release, so the muscle gets a weaker message or none at all. The muscle relaxes, the skin stops folding in that spot, and over the following days the line softens.
The effect is local and temporary. Only the muscles that are injected are affected, which is why placement and dose matter more than the product name. The nerve signal returns gradually over the months that follow, movement comes back, and the line slowly returns with it. That is why treatment is repeated, and it is also why a first visit at a conservative dose is a sensible way to learn how your face responds.
Dynamic lines and static lines
Dynamic lines appear when a muscle moves and fade when the face is at rest. Static lines are the creases that stay even when you are not making an expression, usually because years of the same movement have folded the skin in the same place. A neuromodulator addresses dynamic lines directly. A static line that sits in a treated muscle often softens as the muscle rests, but it may not disappear.
A deep crease, lost volume, or rough skin texture is a different problem with a different tool. For volume, that usually means dermal fillers or a biostimulator; for texture, a skin treatment. The neuromodulators, fillers, and biostimulators on an injectables menu each do one of these jobs, and your injector will tell you which one your concern calls for.
Which products are neuromodulators, and what each is approved for
Several botulinum toxin type A products hold a US approval for cosmetic use, and Savage Serenity carries three of them: Botox Cosmetic, Daxxify, and Jeuveau. Botox Cosmetic is FDA approved for the temporary improvement of moderate to severe frown lines, crow’s feet, forehead lines, and vertical neck bands in adults; Daxxify and Jeuveau are approved for moderate to severe frown lines in adults.
Each product is a different formulation, and a unit of one is not a unit of another. Units cannot be converted or compared across brands, so a per unit price only means something next to the number of units that product needs for the area. Your injector chooses the product at your consultation based on the areas being treated and, if you have had a neuromodulator before, how you responded to it. Our Botox in Fresno page explains how units and pricing work at the practice.
Where neuromodulators are used
Neuromodulators are used where a muscle pulls the skin into a line. The products are used in the upper face and the neck, and each area has a named muscle behind it.
- Frown lines, the vertical “11s” between the brows, made by the corrugator and procerus muscles. All three products the practice carries are used here.
- Crow’s feet, the lines that fan out from the outer corners of the eyes when you smile or squint, made by the orbicularis oculi. Botox Cosmetic is the product used here.
- Forehead lines, the horizontal lines made by the frontalis muscle when you raise your brows. Botox Cosmetic, always planned together with the frown lines, because relaxing the forehead on its own can let the brows drop.
- Vertical neck bands, the cords that stand out on the front of the neck from the platysma muscle. Botox Cosmetic is the product used here.
Other areas your injector may discuss
Some patients ask about a neuromodulator for a lip flip, for bunny lines on the nose, or in the masseter muscle at the angle of the jaw. The practice offers these on an individual basis, planned from your anatomy at your consultation; your injector will tell you whether one suits you and what it is aimed at. The risks described below apply to every placement.
When you see results, and how long they last
Most people see a change within three to seven days, and the effect builds over the first two weeks. In the clinical study of Botox Cosmetic for frown lines, 80 percent of people had a response at day 30. For frown lines, the effect lasts about three to four months. Timing varies by person, by area, and by dose; a strong muscle or a very expressive face may see a shorter run, and some people see a longer one.
The Daxxify and Jeuveau studies did not report how long the effect lasted in a form we can quote as a single figure, so we do not give one for either product. Your injector records when your movement returns and uses that, and not a brochure, to plan your next visit. Retreatment is not done sooner than three months with any product.
Risks and side effects
Neuromodulators are prescription medicines with real risks, and every product in the class carries the same serious warning. The most common side effects are pain or bruising where the needle went in, headache, and a drooping eyelid or brow in a small percentage of people: eyelid drooping in about 3 in 100 people in the frown line studies of Botox Cosmetic and about 2 in 100 for Daxxify and Jeuveau, and brow drooping in about 2 in 100 in the Botox Cosmetic forehead studies. These usually appear within the first week, and while most are temporary, some can last several months or longer.
The serious risk is spread of the toxin beyond the injection site. The FDA Medication Guide states that Botox Cosmetic “may cause serious side effects that can be life threatening, including: Problems breathing or swallowing” and “Spread of toxin effects,” and that these “can happen hours, days, to weeks after an injection.” The guide also names allergic reactions and eye problems, including double or blurred vision, drooping eyelids, eyelid swelling, and dry eyes. The same warning applies to Daxxify and Jeuveau. Read the full Medication Guide before your appointment.
Call the clinic or get medical help right away if, after treatment, you have trouble swallowing, speaking, or breathing; loss of strength or muscle weakness all over the body; double or blurred vision or drooping eyelids; hoarseness or a change in your voice; trouble saying words clearly; or loss of bladder control. If you feel weak or dizzy or your vision changes, do not drive or operate machinery.
A neuromodulator is not for you if you are allergic to any botulinum toxin product or its ingredients, or if there is an infection where you would be injected. Tell your injector about any muscle or nerve condition, any history of trouble swallowing or breathing, and every medication and supplement you take. Treatment is deferred during pregnancy and breastfeeding.
Aftercare, briefly
Aftercare for a neuromodulator is short. Do not rub or massage the treated areas, and wait two hours before strenuous exercise; most people go straight back to their day. The practice adds its own first day instructions, which your injector goes over with you. What happens at a Botox appointment walks through the visit itself, and how to prepare for wrinkle relaxer injections covers the week before.
Neuromodulators at Savage Serenity
At Savage Serenity MedSpa in Fresno, neuromodulator treatment is performed by Angela Hash, BSN, RN, or by one of the injectors she trains, Michelle Perkins, RN, and Candice Brantley, NP. Dr. Luis Lee is the practice’s medical director and supervising physician.
Angela’s approach starts with the whole face. In her words: “My approach is always full facial balancing rather than chasing one line or treating one area in isolation.” In practice that means your injector watches your face at rest and in motion before choosing where to place a neuromodulator and how much to use, starts with a conservative dose so you keep your expression, gives you the unit count for each area before treatment, and sees you at two weeks to review the result. If the line you point to comes from lost volume or skin texture and not from movement, you will be told so and pointed to the treatment that fits.
Frequently asked questions about neuromodulators
Is Botox a neuromodulator?
Yes. Botox Cosmetic was the first neuromodulator with a cosmetic approval in the United States and is the name most people know, which is why “Botox” gets used for the whole category. Daxxify and Jeuveau are neuromodulators too; each is a different formulation of botulinum toxin type A with its own units.
Is a wrinkle relaxer the same thing as a neuromodulator?
Yes. Wrinkle relaxer is the everyday name and neuromodulator is the clinical one; both describe a botulinum toxin type A injection that relaxes the muscle behind a line. A menu that lists wrinkle relaxers, neuromodulators, neurotoxins, or tox is listing the same class of treatment.
What is the difference between a neuromodulator and a filler?
A neuromodulator relaxes a muscle so the skin above it stops creasing; a filler adds volume under the skin to fill a fold or restore a contour. Neuromodulators treat lines made by movement in the upper face and neck. Fillers treat volume loss and folds, such as the lines from the nose to the mouth, the lips, and the cheeks. Many people have both, and they can be done at the same visit.
How long does a neuromodulator last?
About three to four months for frown lines, with the first change visible within three to seven days. Duration varies by person, area, and dose, and retreatment is not done sooner than three months.
Which is better, Botox, Daxxify, or Jeuveau?
There is no single best product. All three relax muscle the same way, and the differences are in formulation, the areas each has been studied for, and how a given person responds. Your injector chooses at your consultation, and because units differ by product, the comparison that matters is the total cost for the area, not the price per unit.
What should I tell my injector before a neuromodulator treatment?
Any past reaction to a botulinum toxin product, any skin infection near the treatment area, any muscle or nerve condition, and any history of trouble swallowing or breathing. List every medication and supplement, including aspirin, ibuprofen, fish oil, and vitamin E, which can increase bruising, and say if you are pregnant or breastfeeding. Never stop a prescribed medication without asking your prescriber.
Book a neuromodulator consultation in Fresno
Book online and choose a consultation. Your injector will look at how your face moves, tell you whether a neuromodulator is the right tool for what you see, and give you a plan with the unit count for each area and the total cost before you decide anything.
Keep reading
- Botox at Savage Serenity: areas, units, pricing, and what to expect
- What happens at a Botox appointment, start to finish
- How to prepare for wrinkle relaxer injections
- How Botox works and when you will see changes
- Injectables at Savage Serenity
Sources
U.S. Food and Drug Administration. BOTOX Cosmetic (onabotulinumtoxinA) Prescribing Information (BLA 103000). Revised 10/2024.
U.S. Food and Drug Administration. Medication Guide, BOTOX and BOTOX Cosmetic (onabotulinumtoxinA). DailyMed. Revised 10/2024.
U.S. Food and Drug Administration. Approval letter, BOTOX Cosmetic, BLA 103000/5000 (glabellar lines). April 12, 2002.
U.S. Food and Drug Administration. DAXXIFY (daxibotulinumtoxinA-lanm) Prescribing Information (BLA 761127). Revised 08/2023.
U.S. Food and Drug Administration. JEUVEAU (prabotulinumtoxinA-xvfs) Prescribing Information (BLA 761085). Revised 07/2019.
American Academy of Dermatology. Botulinum toxin therapy: Overview. Accessed 10/06/2026 (page undated).
American Academy of Dermatology. Botulinum toxin therapy: FAQs.Accessed 10/06/2026 (page undated).
American Society for Dermatologic Surgery. Neuromodulators.Accessed 10/06/2026 (page undated).
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