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How Many Units of Dysport Should Be Given for Lines Between Eyes and Horizontal?
Dosing depends on the strength and size of your muscles, not just the lines you see. For the glabella (the vertical lines between the brows), most patients need somewhere in the range of 50-60 units of Dysport to adequately weaken the corrugator and procerus muscles. Horizontal forehead lines, treated separately, typically require somewhere in the range of 35-50 units depending on how broad and strong the frontalis muscle is. Patients using Dysport preventatively, with little movement to begin with, often do well with less.
Dysport and Botox both take up to two weeks to reach full effect, so a good injector will have you wait that long before adjusting the dose. What matters at that follow-up is how much the muscle still moves, not just whether lines are visible at rest. If you're unhappy with your result after two weeks, contact your injector directly rather than waiting it out. An in-person exam is really the only way to determine the right dose and injection pattern for your anatomy.
Clinical Context
Neuromodulator dosing is guided by muscle bulk and strength, not skin appearance. The corrugator and procerus muscles that cause frown lines are small and compact, while the frontalis muscle across the forehead is broader and thinner. Because muscle size and strength vary from person to person, an experienced injector adjusts the dose and injection pattern to your specific anatomy rather than using a fixed formula for everyone.
