The short answer
Anti-wrinkle injections use a prescription medicine that temporarily blocks the nerve signal to a target muscle so the muscle stops contracting — and so the dynamic line that muscle was creating softens. They cannot add volume.
Dermal fillers contain hyaluronic acid (HA) gel. They physically add volume to a defined area — lips, cheeks, tear-trough, jawline, chin. They cannot relax a muscle.
These are two different categories of treatment for two different categories of problem. They are often combined in the same patient — they are almost never genuine alternatives to each other.
Side by side
| Anti-Wrinkle Injections | Dermal Fillers | |
|---|---|---|
| Active ingredient | A purified protein that relaxes muscle (prescription medicine) | Cross-linked hyaluronic acid (a sugar gel) |
| Mechanism | Blocks nerve signal to a muscle | Physically occupies space in tissue |
| What it treats | Dynamic lines from repeated muscle movement | Volume loss, definition, structural asymmetry |
| Visible immediately | No — onset 3 to 5 days, full effect at 14 days | Yes — final settle at 2 weeks |
| Duration | 3 to 4 months upper face; 4 to 6 months masseter; 4 to 9 months hyperhidrosis | 9 to 18 months depending on product family + area |
| Reversibility | Wears off naturally with no antidote | Reversible on demand with hyaluronidase enzyme |
| Typical price range (London) | £250–£500 per area | £350–£800+ per syringe |
| Best first-time areas | Forehead, frown lines, crow’s feet | Lips, cheeks, chin |
When anti-wrinkle injections are the right answer
Choose anti-wrinkle injections when the concern is a line that appears or deepens with expression — a forehead crease when you raise your brows, a vertical “11” between the eyes when you concentrate, crow’s feet when you smile. These are dynamic lines created by muscle contraction. Relaxing the muscle softens the line at source.
Specific cosmetic indications:
- Upper face: forehead horizontal lines, glabellar “frown” lines, crow’s feet at the eyes
- Mid face: bunny lines along the nose bridge, a gummy smile, brow lift
- Lower face: lip flip (eversion of the upper vermilion border), masseter slimming for a softer jawline, platysmal neck bands
- Medical: bruxism (jaw clenching), hyperhidrosis (excessive sweating), chronic migraine
Anti-wrinkle injections are the lowest-risk entry point to injectable aesthetics because the effect is fully reversible by waiting, the dose is small, and conservative starting doses preserve natural movement.
When dermal fillers are the right answer
Choose dermal fillers when the concern is a shape, volume, or structural issue that is visible at rest — not only with expression. The line or hollow is there when your face is relaxed, because it is being caused by lost volume or anatomy, not by a working muscle.
Specific cosmetic indications:
- Lips: hydration, definition, subtle volume, vermilion border refinement
- Cheeks: mid-face volume restoration, projection of the zygomatic arch
- Tear-trough: filling the under-eye hollow (a high-risk area requiring conservative dosing)
- Chin and jawline: projection, definition, profile balancing
- Nose: non-surgical rhinoplasty for dorsal humps or tip definition
- Hands: rejuvenation of the dorsal hand surface
Dermal fillers carry more risk than anti-wrinkle injections because the product occupies tissue space and (rarely) can compromise blood vessels. All HA fillers are fully reversible with hyaluronidase — an enzyme that dissolves the product on demand if the result needs adjusting or, in emergency, if a vascular complication arises. Choosing a doctor who carries hyaluronidase on-site is non-negotiable for filler treatment.
When you need both
Many patients over their mid-thirties benefit from both treatments, sequenced thoughtfully. A common pattern at Dr Oli Aesthetics:
- Anti-wrinkle injections to the upper face — softens dynamic lines that were already setting in
- Subtle filler in cheeks or chin if volume loss is contributing to the lower-face shape change
- Maintenance of anti-wrinkle injections every 3 to 4 months; filler annual top-up
The total annual spend on this pattern is typically lower than chasing wrinkles with filler alone or chasing volume with anti-wrinkle injections alone — because each tool is being used for its actual purpose.
The most common mistake — using filler for a wrinkle problem
Patients who arrive with deep frown lines and ask for “filler in the lines” almost never benefit from filler in those lines. The frown line is being generated by the corrugator and procerus muscles below the skin, contracting every time the patient concentrates, frowns, or squints. Filler placed into a muscle-driven line is squeezed back out of the line by the same muscle action that created the line. The line returns within weeks.
The right answer is anti-wrinkle injection into the muscle, which stops the line forming. If a residual etched line remains at rest after 2 weeks of muscle relaxation, that residual line can sometimes be treated with a small amount of skin-boosting filler — but only after the muscle has been addressed first.
The other common mistake — using anti-wrinkle injections for a volume problem
The reverse mistake: patients with thin lips, flat cheeks, or weak chin projection asking for anti-wrinkle injections to fix it. Anti-wrinkle injections cannot add volume. Treating thin lips with the injections does nothing for lip volume — at best the upper lip appears slightly fuller via the lip-flip technique (relaxing the muscle that rolls the lip inward), but no actual volume is added.
Bottom line
Different tools for different jobs. The consultation should start with what is actually bothering you, then choose the tool — not the other way around. A good practitioner will sometimes tell a patient that the right treatment is neither — that the concern is best left alone, or addressed with skincare rather than injectables. That conservative answer is the sign of a doctor whose incentive structure is aligned with the patient’s outcome rather than with selling product.
