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SALADS: A Simple Framework for Reducing Botulinum Toxin Complications
Botulinum toxin remains one of the safest and most predictable treatments in aesthetic medicine, yet complications continue to occur. Fortunately, most complications are not caused by the product itself, but by treatment planning, anatomical variation and injection technique.
Earlier this year I had the privilege of presenting a lecture on reducing botulinum toxin complications at Australia's largest aesthetic conference, the Non-Surgical Symposium. Many of these concepts were reinforced during a cadaver anatomy workshop where I was co-faculty, reminding me that regardless of experience, preventing complications always begins with understanding anatomy and refining technique.
Over the years I have developed the acronym SALADS as a practical framework to help practitioners remember six key principles before every injection. Like any good clinical checklist, it encourages us to slow down, assess carefully and inject with purpose rather than habit.
Key Takeaways
- Most botulinum toxin complications are related to technique rather than the product itself.
- A systematic approach improves safety and consistency.
- Small technical adjustments can significantly influence toxin spread.
- Anatomy should guide every injection.
- The non-injecting hand is an active part of safe injection technique.
- Think beyond units and consider the complete injection strategy.
Why We Need a Simple Framework
Complications such as brow heaviness, eyelid ptosis, lower facial asymmetry and unwanted muscle weakness rarely occur because botulinum toxin is unpredictable. More commonly, they result from a combination of anatomical variation, poor needle placement and failure to appreciate muscle function.
Many practitioners focus almost exclusively on dose. While dose is certainly important, it represents only one variable in a much larger equation. Injection speed, needle depth, angle, tissue support and anatomy all influence where the toxin ultimately acts.
The SALADS framework reminds us to pause before every injection and systematically consider the six technical factors that contribute to safe and predictable outcomes.
S – Speed of Injection
One of the simplest changes practitioners can make is to slow down.
Rapid injection creates greater hydrostatic pressure within the tissues, increasing the likelihood that the solution will track along tissue planes rather than remaining concentrated around the intended muscle. As illustrated above, slowing the injection allows the product to be deposited more precisely within the target muscle while reducing unnecessary tissue displacement and improving patient comfort.
Although botulinum toxin diffusion is influenced by multiple factors, gentle injection technique remains one of the simplest ways to improve precision. Slowing down also gives the clinician time to appreciate tissue resistance and needle position before completing the injection.
Sometimes the simplest way to improve your results is simply to inject more slowly.
Clinical Pearl
Slow treatment create precise gentle injections.
A – Anatomy
Every patient recruits facial muscles differently. Muscle thickness, orientation, strength and even insertion points vary considerably between individuals. Ageing, previous treatments and skeletal support further influence how muscles function. Understanding these anatomical differences is one of the most effective ways to reduce complications and achieve predictable results.
Rather than memorising injection points, practitioners should develop a thorough understanding of the underlying anatomy. Appreciating where muscles originate, how they interact with neighbouring structures and how they contribute to facial expression allows treatments to be individualised rather than simply following a standard injection map.
Before every treatment ask yourself:
- Which muscle am I trying to treat?
- Which neighbouring muscles must I avoid?
- How does this patient's anatomy differ from the textbook?
Understanding the relationship between agonist and antagonist muscle groups remains one of the most effective ways to prevent complications. A beautifully placed injection in the wrong patient is still the wrong injection.
Clinical Pearl
Treat the anatomy in front of you—not the anatomy you remember from a textbook.
L – Layer (Depth)
Location is only half the story. Depth determines whether the botulinum toxin reaches the intended muscle or diffuses into surrounding tissues. Understanding the three-dimensional anatomy of the face allows clinicians to select the appropriate tissue plane rather than relying solely on surface landmarks.
Injecting too superficially may reduce efficacy while increasing spread into neighbouring muscles. Conversely, placing the toxin too deeply may deposit it beneath the target muscle, reducing the desired clinical effect. The correct tissue plane varies depending on the muscle being treated, making anatomical knowledge and injection planning essential for predictable outcomes.
Successful treatment requires an appreciation of three-dimensional anatomy rather than simply identifying surface landmarks. The needle tip should reach the target muscle—not merely the target location.
Clinical Pearl
The target is the muscle, not simply the landmark. Correct depth is just as important as correct location.
A – Angle of Injection
Needle angle influences the final position of the needle tip.
Although many injections are delivered perpendicular to the skin, this approach is not universally appropriate. Different muscles vary in thickness, orientation and depth, requiring the injector to adapt their technique according to the underlying anatomy.
As demonstrated above, even small changes in needle angle alter the final position of the needle tip and therefore where the botulinum toxin is ultimately deposited. A few degrees of angulation can determine whether the product remains within the target muscle or spreads towards neighbouring structures, influencing both treatment efficacy and the risk of complications.
Rather than developing a habit of always injecting at the same angle, clinicians should consciously select the angle that best matches the anatomy and treatment objective for each individual patient.
Clinical Pearl
The needle enters the skin at one angle, but the toxin finishes wherever the tip is positioned. Angle is a deliberate clinical decision—not simply a habit.
D – Dose, Drug and Dilution
Dose is only one part of successful treatment.
A common misconception is that more units automatically produce better or longer-lasting results. In reality, successful treatment depends on selecting the appropriate dose for the patient's muscle strength, facial proportions, treatment goals and individual anatomy. As illustrated above, altering the dose changes both the amount of toxin delivered and the area of muscle affected, making conservative, patient-specific dosing essential.
It is equally important to remember that botulinum toxin units are not interchangeable. Each formulation is manufactured using its own proprietary biological assay, meaning the labelled units are specific to that product. Consequently, clinicians routinely administer higher numerical doses of Dysport than Xeomin or Nuceiva despite achieving comparable clinical outcomes. Understanding these differences is essential when changing products or interpreting published literature.
Dilution also deserves careful consideration. Although changing the dilution does not alter the total biological activity administered, it changes the injection volume and may influence precision, tissue spread and ease of administration. Dose, drug and dilution should therefore always be considered together rather than as independent variables.
Clinical Pearl
Think beyond units. The safest and most effective treatment considers the relationship between the drug, dose, dilution and the anatomy being treated.
S – Support
Your non-injecting hand is just as important as the one holding the syringe.
Providing gentle support to the tissues during injection improves both accuracy and patient comfort. Stabilising the skin reduces movement, allowing the needle to be positioned more precisely within the intended muscle while helping to minimise discomfort during treatment.
As demonstrated above, the non-injecting hand is more than simply a way to stretch the skin. Gentle traction or compression can help guide the product towards the target muscle, reduce unwanted spread into adjacent muscles and provide greater control during injection. In anatomically sensitive regions, thoughtful tissue support may also assist in directing the toxin away from underlying foramina and important neurovascular structures.
Support should therefore be viewed as an active part of injection technique. Used correctly, it improves control, enhances precision and contributes to safer, more predictable outcomes.
Clinical Pearl
Your non-injecting hand should work just as hard as the hand holding the syringe. Good support improves comfort, precision and control.
The SALADS Checklist
Before every injection, pause and ask yourself:
| Letter | Question |
|---|---|
| S | Am I injecting slowly? |
| A | Do I understand this patient's anatomy? |
| L | Am I in the correct tissue layer? |
| A | Is my needle angle appropriate? |
| D | Have I selected the right drug, dose and dilution? |
| S | How can my non-injecting hand improve support, precision and control? |
Quick Summary
- Speed – Slow injections improve precision.
- Anatomy – Every patient is different.
- Layer – Correct depth determines where the toxin acts.
- Angle – Needle orientation influences toxin placement.
- Dose, Drug & Dilution – Think beyond units.
- Support – Use your non-injecting hand to improve control and minimise spread.
Why Train With Dermal Distinction Academy?
At Dermal Distinction Academy, complication prevention begins with anatomy. Our courses combine evidence-based education, cadaver anatomy, practical workshops and real patient treatments to help practitioners inject safely and confidently.
Every course is designed to build clinical judgement—not simply teach injection points—so practitioners can achieve safer, more predictable and more natural outcomes.
