Muscle Relaxant: Uses, Effects, Risks and Costs of Botox Injections

In aesthetic medicine, the term "muscle relaxant" refers to botulinum toxin preparations — including Botox, Dysport, Xeomin and Vistabel — that temporarily relax specific muscles to smooth expression lines and achieve therapeutic effects. These agents are used both in aesthetic medicine to treat facial wrinkles and in clinical medicine for a wide range of conditions. This comprehensive guide covers how muscle relaxants work, their applications, the treatment procedure, side effects, contraindications, and costs.

What Is a Muscle Relaxant?

Muscle relaxants are medications that relax skeletal muscles — the muscles attached to the skeleton responsible for body movements. They act temporarily and are therefore reversible. Physicians distinguish between two types of muscle relaxants:

Peripheral muscle relaxants: These act directly at the neuromuscular junction (the "motor end plates") and temporarily block nerve signals to the muscle. Botulinum toxin belongs to this category.
Central muscle relaxants: These act on the central nervous system and reduce overall muscle tone rather than paralyzing specific muscles. They are primarily used for spasticity and pain conditions.

What Is a Muscle Relaxant Used For?

Muscle relaxants can be used in various situations. It is important that they are always administered by licensed physicians, either in a hospital or during outpatient treatment in a practice.

Muscle Relaxant for Wrinkle Treatment

In aesthetic medicine, muscle relaxants are the primary treatment for expression lines (dynamic wrinkles) caused by repetitive facial muscle movements. When certain areas of skin are repeatedly folded, a deepened groove forms in the corresponding facial area. Natural skin aging contributes to the deepening of facial wrinkles over time. By injecting botulinum toxin into the responsible muscle, the muscle is selectively relaxed, the skin above it smooths out, and the face appears softer and younger overall.

Common treatment areas include:

Forehead lines and frown lines (glabellar lines)
Crow's feet around the eyes
Bunny lines on the nose
Lip lines and smoker's lines
Chin dimpling and chin area
Neck bands (platysmal bands)

Muscle Relaxant in Surgical Procedures

During surgery, physicians use muscle relaxants to prevent patients from tensing during the procedure. This is essential for operations in the chest or abdominal cavity. When intubation is required, muscle relaxants also assist in the process and reduce the risk of injury.

Muscle Relaxant for Pain Conditions and Medical Indications

When muscles are tense and pain or cramping occurs, physicians administer muscle relaxants to relieve the tension. Medical indications for administration can include anal fissures, eyelid spasms and facial spasms, hoarseness due to laryngeal muscle spasm, excessive sweating (hyperhidrosis), chronic migraine, and spasticity of the limbs.

Botox vs. Other Muscle Relaxants: What Is the Difference?

Botox is a brand name for a specific muscle relaxant based on botulinum toxin type A, manufactured by AbbVie. Colloquially, "Botox" is often used as a synonym for all muscle relaxants of this type. From a medical standpoint, "muscle relaxant" describes an entire drug category. The most common botulinum toxin products used in aesthetic medicine are:

Botox (AbbVie): The original and most widely used preparation worldwide.
Dysport (Ipsen): Dosed at approximately 3:1 compared to Botox in units; similar efficacy and duration.
Xeomin (Merz): Contains no accessory proteins (naked botulinum toxin), which may reduce the risk of antibody formation.
Vistabel (AbbVie): The European brand of Botox specifically approved for cosmetic use.

All preparations contain botulinum toxin type A and have comparable effects and duration of action.

How Does a Muscle Relaxant Treatment Proceed?

Injections with muscle relaxants are always offered by specialist physicians with corresponding qualifications in aesthetic-surgical medicine, by dermatologists, or by gynecologists. The procedure includes several steps:

First, a detailed consultation takes place to clarify the treatment need and rule out contraindications. The physician discusses the patient's wishes, assesses the facial anatomy, and sets realistic expectations.

The actual treatment duration is typically only a few minutes, so patients often need to plan for no longer than 30 minutes. After facial cleansing, a numbing cream is applied to the treatment area if desired. The muscle relaxant is then administered with a fine needle at precisely determined injection points. Most patients describe the injections as minimal discomfort.

Important: In Germany, cosmetic-medical treatment may only be performed by licensed physicians. Treatment at cosmetics studios should be strongly avoided due to the lack of medical training, which means complications cannot be excluded.

When Does the Effect of Muscle Relaxants Become Visible?

First effects are typically visible after 2 to 5 days. The full effect is reached after 7 to 14 days. A follow-up appointment after 2 weeks is standard practice — corrections can be made at this point if necessary. There is no immediate visible change directly after the injection.

How Long Does the Effect of Muscle Relaxants Last?

Wrinkles can typically be smoothed for several months, as the muscle relaxant can work for up to six months. This is only a guideline figure — the changes may reverse a few weeks earlier. For facial treatments, the effect typically lasts 3 to 6 months. With repeated treatment, the duration can increase as the muscle gradually atrophies. Regular treatment every 4 to 6 months is recommended for a lasting result.

A repeat injection can take place as needed and in consultation with the treating physician. To ensure the result looks as natural as possible, however, excessively frequent injections with muscle relaxants are not recommended.

What Are the Precautions Before a Muscle Relaxant Injection?

If a laser treatment on the face is planned, patients must ensure it takes place before the injection. Physicians also recommend stopping blood thinners and pain medications containing blood-thinning agents. Up to two weeks before treatment, patients should also ensure they have no active infection — this includes colds or herpes infections. If body or facial areas with hair are to be treated, shaving should not take place at least two to three days before the injection.

Anyone considering muscle relaxant treatment should avoid tattoos, piercings, or surgeries for at least a few weeks before the appointment. Invasive cosmetic treatments such as microneedling should also be avoided.

Side Effects of Muscle Relaxant Injections

Side effects may occur in some cases. Patients are informed about possible individual risks before the injection. When treatment is performed properly, side effects are limited. They include:

Redness and swelling at the injection site
Bruising (hematoma)
Itching
Dry eyes
Drooping eyelids (ptosis) — affects approximately 1 to 2% of cases, resolves within 6 to 8 weeks
Headaches

There are no permanent side effects when correctly injected quantities are used. If more significant complications occur involving severe pain or unusual symptoms, a physician must be consulted immediately.

When Should Muscle Relaxants Not Be Administered?

For specific neuromuscular diseases, physicians will not administer muscle relaxants. Pregnant and breastfeeding women should also avoid treatment. If an allergy to specific components of a muscle relaxant exists, this also represents a contraindication. Specialist physicians can advise on alternative treatment options if needed.

Wrinkle Treatment with Hyaluronic Acid and Muscle Relaxants

Expression lines are usually treated with muscle relaxants. In addition, some patients opt for hyaluronic acid treatment. While muscle relaxants relax muscles to prevent wrinkle formation, hyaluronic acid acts by adding volume and plumping the skin. Combined therapy can therefore achieve both smooth and youthful-looking skin. Typical facial areas where hyaluronic acid is used include the nose, lips, and under-eye hollows.

How Much Does a Muscle Relaxant Injection Cost?

Costs vary depending on the practice, the extent of treatment, and the amount of product used. Generally, patients can expect approximately 300 to 600 euros for a treatment. For extensive treatments, up to 900 euros should be budgeted.

Can You Prevent Expression Lines Without Muscle Relaxants?

Expression lines develop naturally — even without external influences — because the corresponding facial areas are repeatedly tensed. Nevertheless, excess sun exposure, an unbalanced diet, and certain lifestyle habits can accelerate skin aging. Good preventive measures include: applying sunscreen daily, drinking sufficient water to keep skin elastic and fresh, avoiding aggressive facial cleansing, and limiting consumption of coffee, cigarettes, and alcohol, which all negatively impact skin health.

Are Muscle Relaxants Available Without a Prescription?

In Germany, most muscle relaxants sold as sedatives are usually prescription-only. Natural muscle relaxants available without a prescription that are said to have a calming effect are usually based on purely plant-based ingredients. These include valerian and rosemary, for example. A plant-based natural muscle relaxant offers the advantage of few side effects, but a physician visit is still recommended to clarify the underlying causes of tension or pain.