TL;DR
- Anti-wrinkle injections relax the muscles that cause expression lines. Dermal fillers add volume to hollows, folds and lips.
- Anti-wrinkle results last 3 to 4 months. Filler results last 6 to 18 months depending on the area and product.
- Lines that appear only when you move your face (frowning, smiling) usually need anti-wrinkle injections, not filler.
- Hollows, folds and volume loss that are visible even at rest usually need filler, not anti-wrinkle injections.
- Combining both, sometimes called a liquid facelift, is common and often gives the most balanced result.
What’s the Real Difference Between Fillers and Anti-Wrinkle Injections
Anti-wrinkle injections and dermal fillers are both quick, non-surgical injectable treatments, but they solve opposite problems. Anti-wrinkle injections use botulinum toxin to block nerve signals to a targeted muscle, so it can no longer contract enough to fold the skin into a line (British College of Aesthetic Medicine, 2024). Dermal fillers, most often made from hyaluronic acid, physically add volume beneath the skin to lift hollows, fill folds or shape lips. One relaxes movement. The other restores structure.
How Each Treatment Actually Works
Anti-wrinkle injections target dynamic lines, the ones caused by repeated muscle movement such as frowning, squinting or raising the eyebrows. A small dose is injected directly into the muscle, and over 3 to 14 days the muscle gradually weakens, softening the line above it. Nothing is added under the skin, so the face keeps its natural shape, just with less movement in that specific area.
Dermal fillers work on static lines and volume loss instead, the changes visible even when your face is completely still. The gel is injected beneath the skin to lift, fill or reshape the area. Results are visible immediately, though final shape settles once any swelling reduces over the following 1 to 2 weeks.
Dermal Fillers vs Anti-Wrinkle Injections at a Glance
| Anti-wrinkle injections | Dermal fillers | |
| Mechanism | Relaxes the muscle | Adds volume beneath the skin |
| Best for | Frown lines, forehead lines, crow’s feet, bunny lines | Cheeks, lips, jawline, tear troughs, nasolabial folds |
| Not suitable for | Volume loss or hollow areas | Lines caused mainly by muscle movement |
| Onset | 3 to 14 days | Immediate |
| Typical duration | 3 to 4 months | 6 to 18 months |
| Starting price (London) | From around £180 to £250 | From around £250 to £350 per syringe |
| Downtime | Minimal, occasional redness | Mild swelling or bruising for 24 to 48 hours |
Which Lines Actually Need Which Treatment
This is where most people get it wrong, and it is usually the reason a treatment “didn’t work.” If you frown at the mirror and a line appears that wasn’t there when your face was relaxed, that’s a dynamic line, and anti-wrinkle injections are the right tool. If the line or hollow is visible even with a completely still, relaxed face, that’s usually volume loss or a static fold, and filler is the better fit.
In practice, the area between the eyebrows (often called the “11s”) is almost always dynamic and responds well to anti-wrinkle injections, while a nasolabial fold running from the nose to the mouth is frequently a mix of both muscle movement and lost cheek volume, which is exactly why a proper consultation matters more than picking a treatment off a list. Restoring cheek volume with dermal filler treatments often softens that fold on its own, before any anti-wrinkle injection is even considered.
Can You Have Both at the Same Time
Yes, and it’s one of the most requested combinations in aesthetic clinics. Using anti-wrinkle injections and dermal fillers together is sometimes described as a liquid facelift, since it addresses both muscle movement and lost volume in a single visit (American Society of Plastic Surgeons, 2024). A common approach is to treat anti-wrinkle injections first for the upper face, then assess volume needs in the mid and lower face afterward, since softening muscle movement can sometimes change how much filler is actually needed.
Cost Comparison in London
Anti-wrinkle injections are generally the lower-cost entry point, with London clinics typically starting around £180 to £250 depending on the number of areas treated. Dermal fillers are priced per syringe rather than per area, with 1ml starting from roughly £250 to £350 in central London, including South Kensington, Chelsea and Knightsbridge. Combined treatments cost more per visit but often work out better value over a year, since fewer separate appointments are needed to maintain results across the whole face.
How Long Each One Actually Lasts
Anti-wrinkle injections typically last 3 to 4 months before muscle movement gradually returns. Many regular patients notice they can stretch the gap between sessions over time, as the muscle weakens with repeated treatment. Dermal fillers last considerably longer, from 6 months in high-movement areas like lips to 18 months in more stable areas like the cheek or jawline, with the patient’s metabolism, activity level and product choice all affecting how quickly it breaks down (Nuffield Health, 2025).
Which Treatment Hurts Less
Both are well tolerated by most patients. Anti-wrinkle injections use a very fine needle and are generally described as close to pain-free. Dermal fillers can involve slightly more sensation since a larger volume is placed under the skin, though most modern fillers already contain a small amount of local anaesthetic mixed into the gel, and topical numbing cream is standard practice before treatment.
Why Practitioner Choice Matters More Than Product Choice
Anti-wrinkle injections are a prescription-only medicine in the UK, meaning only a prescriber, such as a doctor, dentist or independent nurse prescriber, can legally administer them. Dermal fillers are not classed the same way. They are treated as a cosmetic product rather than a prescription medicine, so there is currently no legal requirement for the injector to hold any medical qualification at all (Save Face UK, 2024). This is the opposite of what most people assume, and it’s the reason checking a practitioner’s registration (GDC, NMC or GMC) matters more with fillers than with anti-wrinkle injections, not less. Our earlier guide on what dermal fillers actually are goes into this regulation gap in more detail.
How to Decide Which One You Need
A simple way to work it out before your consultation:
- Line only appears when you move your face → likely anti-wrinkle injections
- Hollow, fold or thin area visible at rest → likely dermal filler
- Both, in the same area → often a combination, assessed properly first
- Not sure at all → book a consultation rather than guessing from a mirror
A trained practitioner will map your face against muscle movement and volume loss before recommending either, which is a more reliable starting point than trying to self-diagnose from what a competitor’s brand name suggests. If muscle relaxing has been the main focus so far, it’s also worth reading about how it’s used for jaw slimming or migraine-adjacent tension, covered in Botox without the needle and related peptide alternatives, for context on where muscle-relaxing treatments extend beyond classic frown lines.
Frequently Asked Questions
Can dermal fillers fix forehead lines?
Not effectively on their own, since forehead lines are usually caused by muscle movement. Anti-wrinkle injections are the more suitable treatment for this area.
Do anti-wrinkle injections add any volume to the face?
No, they only relax muscle movement. If volume loss is the concern, filler is needed alongside or instead.
Is it safe to have both treatments in one appointment?
Yes, this is common practice and is often planned deliberately as part of a combined treatment plan, provided a proper consultation has assessed suitability first.
Which treatment is better for someone in their late 20s?
Many younger clients start with anti-wrinkle injections for early dynamic lines or subtle lip or cheek enhancement, since significant volume loss is usually more relevant later in life.
How do I know if my practitioner is properly qualified?
Check they are registered with the GDC, NMC or GMC and ask directly about their specific training in facial anatomy and injectable treatments, since this varies far more than people expect.
Will stopping anti-wrinkle injections make wrinkles worse?
No, the face simply returns to how it looked before treatment as muscle movement gradually resumes. It does not accelerate ageing.