For frown lines between the eyebrows, the FDA label for Dysport says repeat treatment should be given no more often than every three months, and the timing of each repeat visit depends on when the effect of the previous treatment has worn off, as judged with your clinician.
How often should you get Dysport?
Dysport (abobotulinumtoxinA) is a prescription botulinum toxin. Its only cosmetic FDA approval is the temporary improvement in the appearance of moderate to severe glabellar lines (the vertical "11" lines between the brows) in adults younger than 65. For that use, the prescribing information states that the clinical effect may last up to four months and that Dysport should be given no more frequently than every three months. In clinical studies, repeat dosing continued to work over up to four repeated treatments.
Patient education sources describe a similar rhythm. MedlinePlus notes that people may receive additional injections every three to four months, depending on their condition and how long the effect lasts. The American Academy of Dermatology (AAD) says the effect of botulinum toxin on lines and wrinkles lasts about three to four months, and sometimes longer. Three months is the minimum interval on the label, not a reminder to rebook on a fixed date.
What results can you expect from Dysport treatments?
Dysport works on dynamic wrinkles, the lines that deepen when muscles contract. The label explains that frown lines come from the activity of the corrugator and procerus muscles between the brows, and the AAD explains that botulinum toxin temporarily relaxes the targeted muscles so the lines diminish. The AAD adds that dermatologists aim to inject just enough to relax those muscles while you keep your natural facial expressions.
The label reports Dysport results from three placebo-controlled studies. Success meant frown lines rated none or mild at maximum frown, with an improvement of at least two grades on a four-point scale, by both the investigator and the participant, 30 days after a 50-unit treatment. In those studies, 55%, 52% and 60% of people treated with Dysport met that definition, compared with none of the people given placebo. Many people improve, but not everyone reaches that level, so judge your results against your own starting point.
What decides when your next treatment should be?
The practical signal is the return of muscle movement and of the lines you treated. The Dysport label notes that the location, size and use of the frown muscles vary markedly between people, which is one reason the effect does not fade on the same day for everyone. The American Society of Plastic Surgeons (ASPS) says results from botulinum toxin may be noticed within a few days, can take up to a week to reach full effect, and typically last about three to four months.
The effects of Dysport fade gradually. In the label's first study, investigators rated frown lines as none or mild at maximum frown in 88% of Dysport-treated people at day 30, 64% at day 60, 43% at day 90 and 23% at day 120. These study results show declining response over time; your clinician determines repeat-treatment timing from your individual response.
Some people find the effect lasts longer over time. The AAD notes that with repeat treatment for lines and wrinkles, the treated muscle may thin, which can make results last longer. That does not happen for everyone, so it is worth reviewing your own pattern with your clinician rather than assuming a set interval.
Why shouldn't repeat treatments be closer together?
The label is direct about this: do not exceed the recommended dosage and frequency of administration. In clinical trials, people who received a higher dose had more eyelid drooping (ptosis). In long-term safety studies with re-treatment at intervals of three months or more, the rate of eyelid ptosis did not increase.
The label also warns that the effect of giving botulinum toxin products at the same time, or within several months of each other, is unknown, and that excess weakness may get worse if another dose is given before a previous dose has worn off. If you are thinking about an early "top-up" or a treatment with a different brand, tell the clinician exactly what you received and when.
Dysport units are not interchangeable with other botulinum toxin products, and MedlinePlus notes that one brand cannot be substituted for another. Switching brands means a new plan, not a unit-for-unit swap.
Does Dysport stop working with repeat use?
Like other therapeutic proteins, Dysport can trigger antibodies. In the glabellar line studies summarized in the label, 1,554 people were tested after up to nine treatment cycles; three developed binding antibodies after treatment, and none developed neutralizing antibodies. Antibody rates depend on the laboratory test used, and the label cautions that comparing them across products may be misleading.
The label also describes a repeat-dose study in which people could receive up to four treatments. The share who met the success definition in the final treatment cycle was comparable to the share in earlier cycles.
If a treatment seems weaker or shorter than usual, tell your clinician. They can review the dose, placement, timing and product history before deciding on any change, rather than simply adding more units sooner.
What about areas other than frown lines?
Because Dysport's cosmetic approval covers glabellar lines only, using it in other facial areas, such as the forehead or around the eyes, is off-label. Off-label use is a clinical decision that a licensed prescriber can make, but the label's dosing and re-treatment guidance was written for the approved use. Ask whether each area in your plan is on-label or off-label and how the clinician decides on timing when several areas are treated together.
How do you plan maintenance treatments?
A maintenance plan is a treatment schedule built around your own response rather than a calendar reminder. A useful treatment plan, agreed with your clinician, usually covers:
- The earliest date for your next visit, which for frown lines is no sooner than three months after the last one
- The signal to rebook. The AAD says you can have another treatment when the lines and wrinkles return.
- The dose and injection points. For frown lines, the label dose is 50 units split into five injections, and re-treatment uses the same technique as the first treatment.
- Any other botulinum toxin treatment planned elsewhere, including for medical reasons, since it can change the timing
A simple treatment log can make repeat planning easier. After each visit, note:
- The date, the product name and the number of units for each area
- When you first noticed the effect and when movement started to return
- Any side effects, such as a droopy eyelid, headache or dry eyes, and how long they lasted. In the label's placebo-controlled frown-line studies, the most common reactions included nasopharyngitis (inflammation of the nose and throat), headache, injection site pain or reaction, eyelid swelling and eyelid drooping.
- Any other botulinum toxin treatment you received anywhere, including for medical reasons
MedlinePlus advises telling your clinician if you have had eye or face surgery, any side effect from any botulinum toxin product, or a change in the way your face looks, and listing every prescription and nonprescription medicine, vitamin and supplement you take. Review that list with the treating team at every visit.
When should you call your clinician or get emergency care?
Contact the treating clinic about eyelid or brow drooping, eye dryness or irritation that does not settle, or any side effect that worries you. Ask about an eye-specialist referral for persistent dryness or irritation; new vision changes need immediate assessment.
The label carries a boxed warning that botulinum toxin effects can spread beyond the injection area, hours to weeks after treatment. Get emergency care for trouble swallowing, breathing or speaking. Seek immediate medical evaluation for new weakness outside the treated area, double or blurred vision, or loss of bladder control. Cleveland Clinic advises getting medical help right away for problems with breathing, swallowing or talking.
Questions to ask before your next Dysport visit
- Based on my record, when is the earliest my next treatment should be?
- Is every area in my plan on-label, or are some off-label?
- How many units are planned for each area, and will that change from last time?
- What should I do if the effect seems weaker or wears off sooner than before?
- Does any other botulinum toxin treatment I have had change the timing?
Review safety questions to ask before a neuromodulator consultation and aftercare precautions and when to call, explore facial aesthetics at Anew Laser MD, or use the contact page to ask whether Dysport is offered at your location. Follow your treating clinician's instructions for timing and aftercare.
Independent sources
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General educational information is not a diagnosis or treatment recommendation. Consult a qualified clinician about your individual circumstances.