Tulip petals frozen mid-fall inside an hourglass in dramatic light, a metaphor for timing Dysport around an event.
By Alexander E. Bonato, MD — Board-Certified in Internal Medicine · Medically reviewed November 2026.
TL;DR: Book Dysport about a month before your event. Most people notice it working in two to three days, it keeps building for a week or two, and it generally lasts about three to four months, so a month out puts the event near the peak and leaves room for a touch-up. If you're inside two weeks you can still do it, but you lose the cushion. These numbers come mostly from a systematic review sponsored by Dysport's manufacturer, so treat them as a good map and not a guarantee.
A while back, four of us sat down at a table with a few drinks and planned a two-week trip. Every day, in order. Which city, which train, which night was meat-on-a-stick night.
I want it on the record that I was not the planner. I was there for a good time. My wife has since pointed out that I was also, technically, in the room, and that my contribution to the itinerary was saying "that sounds great" with a lot of confidence.
The one part of that plan that held up was the part where we started from the day we had to be at the airport and counted backward. Everything else, we learned about on the ground.
Anyway. I'm a physician, and this time of year the question I get most is some version of this one: how far ahead of the wedding, the reunion, or the holiday party should I book Dysport? Same answer as the airport. Start at the date and count backward.
What Happens After the Needle
Let's walk through it. You leave the appointment looking exactly the way you arrived. Nothing happens that afternoon and nothing happens that night, so don't stand at the bathroom mirror at nine p.m. squinting at your forehead. I've caught myself in my own bathroom mirror doing a mental treatment plan on my forehead. Mental. The mirror stayed the same.
Then, around day two or three, you try to frown and the frown doesn't quite show up. That's the typical timeline. A systematic review of 42 studies of Dysport found that onset was most often reported at two to three days, and in a couple of studies it showed up in as little as 24 hours (Reference 1). Some trials measured closer to five or six days, so I'd give it a full week before judging anything.
From there it keeps building. Depending on the source, the fullest effect lands somewhere between one and four weeks after the injection (References 1 and 2). In one split-face trial comparing two toxins, lines had visibly dropped by day two and looked best around day seven (Reference 1). That's why the plan isn't "book it Thursday and walk into the party Saturday." Day two is not the peak.
How Long It Lasts
Now the other end. Most people want to know when it wears off, usually because there's another event in March.
In the same review, the most common answer was about four months. Eighteen studies still had the effect working at month four by their own definitions, four at month five, and three at month six (Reference 1). That's a count of studies and not a measured average, and the studies defined "still working" in different ways, so don't read it as a promise. The studies that followed people through repeat treatments put the middle a little shorter, a median of roughly 84 to 116 days. That's about three months to just under four (Reference 1). Some people get five or six. A few fade before three.
It doesn't switch off like a light. It fades gradually (Reference 2). The label asks for at least 12 weeks between treatments (Reference 1).
Here's the math with real dates. A treatment on November 19 is typically fading somewhere between mid-February and mid-March. That covers the party and leaves you looking right at the next thing your family announces.
One area deserves its own sentence. In one trial of crow's feet, only 16 to 40 percent of people still counted as responders at 12 weeks (Reference 1). That's a single trial, so I wouldn't build a plan around it. It's a reason to ask about the specific area you care about.
When to Book Dysport Before an Event: Working Backward From Your Date
Here's how I do it. Book about a month before the event. That gives you treatment day, then two weeks for it to take and settle, then a visit where we look at it together. If something needs a touch-up, we do it then, with about two weeks of cushion before the event. I do touch-ups rarely. I just like knowing the room is there.
Say your party is Saturday, December 19. Treatment around November 19. Check-in around December 3. Party December 19. That's the whole plan, and it fits on a napkin, which is more than I can say for our itinerary.
Notice what the evidence does and doesn't say. The studies tell us when it starts, when it peaks, and when it fades. None of them tested one booking schedule against another. A month ahead is my judgment built on those numbers. It isn't a trial result.
What if you're inside two weeks? You can still do it. Most people see something in two to three days, so it can work. What you give up is the cushion. Response varies from person to person (Reference 1), and a treatment the week of the event leaves no time to adjust. If it's your first time ever, I'd move the treatment before I'd move the wedding. And whatever you do, don't try a new product the week of the event.
A blank invitation card leaning against an alarm clock, a metaphor for counting backward from the event date.
A Note on Brands
Everything above is about Dysport. Other toxins behave a little differently. In one head-to-head trial, a different product reached onset about two days sooner (Reference 1). I go through the differences in our Dysport vs. Botox post, and the mechanics are in how Dysport works. If you're also thinking about filler for the event, it runs on its own timeline. I cover that in fillers before an event.
What Can Go Wrong
Every injection has side effects, and they're worth knowing before the week of the party. The usual ones are bleeding, swelling, redness, and pain right at the injection spots. Headaches can happen, and in the literature they fade over two to four weeks (Reference 2). The one people ask about is a drooping eyelid, which happens when the product spreads to a nearby muscle. It can last several weeks, and it can be treated with eye drops (Reference 2). Response varies from one person to the next, and that's the main reason I don't like leaving it to the last minute.
None of this is meant to talk you out of it. It's much easier to hear in November than in the week of the wedding.
Frequently Asked Questions
Can I get Dysport the week of the event?
You can. It starts working in two to three days for most people, so it isn't a waste. What you lose is the cushion. A wedding is a bad week to find out how you respond to a new treatment. I'd rather we learn that in November.
How soon will I actually see it?
Most people notice something in two to three days. Some take closer to a week, so don't make any decisions on day one. The full effect builds over one to four weeks depending on the source. Day one is for patience, and I know that's the hard part.
Will I look frozen at the party?
Dose and placement decide that, and we talk through both beforehand. Tell me what you want the photos to look like and we plan around it. The check-in two weeks later is there so we can adjust. Nobody should have to find out at the open bar.
How soon can I do it again?
The label asks for at least 12 weeks between treatments (Reference 1). The studies most often saw it still working into month four, which is when a lot of people start thinking about the next one. If you're at week ten and anxious about a party, call me and we'll talk it through. Panic is not a dosing schedule.
Is it different for men?
A little, in one respect. In one trial that measured onset, men took slightly longer than women, about 5.9 days versus 5.3 on average, and sex was a statistically significant predictor (Reference 1). That's under a day, so it won't change the plan. The bigger difference is dose, and that's a conversation for the consultation.
Start With the Date
If you've got a date on the calendar, come in and let's count backward from it together. Bring the date and bring your questions. We're in Medford, and patients come from Ashland and Grants Pass too. Book a consultation, and you can be a person with a plan instead of a person with a note on a phone. Our page on wrinkle relaxers in Medford has the rest.
References
Nestor M, Cohen JL, Landau M, Hilton S, Nikolis A, Haq S, et al. Onset and Duration of AbobotulinumtoxinA for Aesthetic Use in the Upper Face: A Systematic Literature Review. J Clin Aesthet Dermatol. 2020;13(12):E56-E83. (Sponsored by Ipsen, Dysport's manufacturer. A systematic review of 42 studies without pooled statistics. Some included studies used doses above the label.)
Satriyasa BK. Botulinum toxin (Botox) A for reducing the appearance of facial wrinkles: a literature review of clinical use and pharmacological aspect. Clin Cosmet Investig Dermatol. 2019;12:223-228. doi:10.2147/CCID.S202919 (A narrative review, not a systematic one.)
