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Anti-wrinkle injections vs fillers: what is the difference?
For anyone deciding between injections for lines and filler for volume. You will know which concerns each treats, how quickly it works, how long it lasts, what the side effects are and when the two are used together.
At a glance
Anti-wrinkle injections relax the muscles that crease the skin when you frown, raise your brows or smile, so they soften lines that form with expression. Dermal fillers are gels, mostly hyaluronic acid, that replace lost volume and soften folds. Injections take full effect at 10–14 days and typically last 3–4 months; hyaluronic acid fillers show at once and typically last 6–12 months, up to 18 months in the lips. Because they treat different causes, they can be combined.
On this page
- How do the two treatments work?
- Which concerns does each one treat?
- How quickly do they work, and how long do they last?
- How often are repeat treatments needed?
- What if I do not like the result?
- What happens at the appointment?
- What side effects should I know about?
- Can they be used together?
- How should I plan treatment around a trip to Istanbul?
- Who should wait or choose something else?
How do the two treatments work?
Anti-wrinkle injections use tiny doses of botulinum toxin type A, best known by the brand name Botox. Small amounts go into the muscles between the brows, across the forehead and at the outer corners of the eyes, so lines soften while your face still moves.
Fillers work on volume rather than movement. Most are hyaluronic acid, a sugar found naturally in the body, injected under the skin to restore fullness to lips, cheeks, temples or under-eye hollows and to soften folds such as the lines from nose to mouth.
Which concerns does each one treat?
| Concern | Usually treated with | Why |
|---|---|---|
| Frown lines between the brows | Anti-wrinkle injections | The line forms when the muscle contracts |
| Forehead lines and crow's feet | Anti-wrinkle injections | Relaxing the muscle softens the crease |
| Thin lips | Filler | Adds volume |
| Flat cheeks, hollow temples or under-eye hollows | Filler | Replaces lost volume |
| Lines from nose to mouth | Filler | Softens the fold |
| A soft or blurred jawline | Jawline filler | Sharpens the jaw's edge |
| A wide lower face from bulky jaw muscles | Anti-wrinkle injections (off-label) | Relaxing the chewing muscle can slim the face |
| Loose, sagging skin | Neither | Neither lifts loose skin |
| Dark circles caused by pigment | Neither | Filler does not lighten pigment |
When sagging is the main concern, a facelift may suit better than either injection, and for deep lines at rest with low, heavy brows, a brow lift may help more.
How quickly do they work, and how long do they last?
- Anti-wrinkle injections: most people notice a change within 3–7 days, the full effect shows at 10–14 days, and it typically lasts 3–4 months, sometimes longer.
- Hyaluronic acid fillers: the change is visible at once, swelling settles within 1–2 weeks, and the effect typically lasts 6–12 months, up to 18 months in the lips.
- Jawline filler: up to about 12 months with a product approved for the jawline.
- Other filler materials: calcium hydroxylapatite and poly-L-lactic acid last about one to two years. PMMA is a permanent filler, and like other non-hyaluronic acid fillers it can be difficult or impossible to remove.
How often are repeat treatments needed?
Anti-wrinkle injections can be repeated after three months or more; repeating them more often has not been studied, so plan intervals at least that long. With repeat treatments, some people find the effect lasts longer.
Filler is absorbed slowly, so the volume fades gradually, and repeat treatment maintains it. If filler has been dissolved, wait at least 14 days before more is placed.
What if I do not like the result?
The effect of anti-wrinkle injections fades on its own as muscle movement gradually returns, and a heavy brow or drooping eyelid, if it occurs, is temporary. Hyaluronic acid filler can be dissolved with an enzyme called hyaluronidase, and one or two sessions are usually enough.
Calcium hydroxylapatite, poly-L-lactic acid and PMMA cannot be dissolved this way, and removal can be difficult or impossible. That is one reason to know exactly which product is used before you agree to treatment.
What happens at the appointment?
Both follow an in-person consultation. Anti-wrinkle injections usually take under 15 minutes with a very fine needle, normally without anaesthetic. Filler takes 15–30 minutes, up to an hour for several areas, with numbing cream or local anaesthetic, and many products contain lidocaine.
Afterwards, stay upright for 3–4 hours after anti-wrinkle injections, do not rub the areas and leave strenuous exercise for 24 hours. After filler, avoid strenuous exercise for 24–48 hours, strong sun and sunbeds while swelling settles, and pressing or massaging the area for three days. Keep a note of the date and the product used, and tell anyone treating you in the next four months about anti-wrinkle injections.
What side effects should I know about?
Both commonly cause small marks, redness, swelling or bruising. After anti-wrinkle injections, a bruise can take about a week to fade. In clinical trials, headache affected about 9 in 100 people treated for forehead lines, and a temporary heavy brow or drooping eyelid 2–3 in 100.
After filler, most bruising and swelling clear within 7–14 days, and small lumps or unevenness can occur. Rarely, nodules or inflammation appear months or years later. The rare risk that matters most is filler entering or pressing on a blood vessel, which can cause skin loss, blindness or stroke; the risk is highest around the nose, forehead and between the brows.
Can they be used together?
Yes. Because they treat different causes, they can be combined, sometimes in one visit, although the combination has not been studied separately in controlled trials. If you are also considering ultrasound skin tightening, mention any filler: energy is not delivered over areas containing filler, so treatments are planned in order.
How should I plan treatment around a trip to Istanbul?
Both fit a short stay of one to two days, including the consultation. Avoid having filler just before a flight: serious complications can show during or soon after treatment, so plan to stay in Istanbul at least overnight. Lip swelling can last a day or two, so avoid booking photos or events straight afterwards.
The full effect of anti-wrinkle injections appears at 10–14 days, usually once you are home. Before you leave, agree how any questions will be handled and make sure you know whom to contact about warning signs.
Who should wait or choose something else?
- Pregnancy or breastfeeding: both treatments are usually postponed.
- A cold sore, spots or an infection in the area: treatment waits until it has cleared.
- Anti-wrinkle injections: a neuromuscular condition such as myasthenia gravis, or an earlier reaction to botulinum toxin.
- Fillers: a bleeding disorder, severe allergies including to lidocaine, a tendency to keloid scars, or being under 22.
- Either: feeling pressured into treatment, or hoping for a dramatic change.
Frequently asked questions
My lines show even when my face is still. Which treatment helps?
Anti-wrinkle injections soften lines that form with expression the most; lines visible at rest may only partly improve. Folds caused by lost volume, such as those from nose to mouth, are usually softened with filler. If deep lines at rest come with low, heavy brows, a brow lift may help more.
Does it matter who does the injecting?
Yes. Dose and placement decide whether a face looks rested or artificial, which is why Op. Dr. Bilgehan İlker's own writing stresses that these injections belong with a trained specialist. Side effects of under-eye filler are more likely with less experienced injectors, and counterfeit toxin used outside medical settings has caused botulism-like illness.
Which treatment has the more serious rare risks?
For both, most side effects are mild and short-lived. With fillers, the rare serious risk is a blocked blood vessel, so hyaluronidase should be at hand. With anti-wrinkle injections, the product label warns that the effect can spread and cause swallowing or breathing problems, although at cosmetic doses this is very unlikely.
Jawline filler or jaw-muscle injections for a wider lower face?
They work in different ways. Jawline filler adds definition along the jaw's edge and can add projection to a small chin. Anti-wrinkle injections into a strong chewing muscle can slim a square lower face where the width comes from bulky muscle; this use is off-label. An examination shows which applies to you.
Will I need a top-up after the first treatment?
Sometimes. After anti-wrinkle injections, judge the result at 10–14 days and report any unevenness then. After filler, a small top-up or adjustment may be considered at about a month, if advised. Judging either in the first days can mislead, because the effect is still building or swelling is still settling.
How should I prepare for either treatment?
List all your medicines and supplements, including blood thinners, but do not stop anything prescribed without your doctor's advice. Avoiding alcohol for 24 hours beforehand can reduce bruising from anti-wrinkle injections. Mention any allergy, especially to lidocaine, and earlier fillers or facial surgery, with product names if you know them.
