Men in general have thicker facial muscles and may require more product than women to get the desired effect. The average treatment for the glabella (between the eyes) is 30-80 units. For the forehead it is 20-60 units. Your injector should review the recommendation with you based on your...
You may want to look into Daxxify. This is a newer neuromodulator on the market and is formulated just a bit differently than Botox and Dysport. It has a longer longevity as well so less frequent treatments are needed. I've included a video I hope you find helpful.
It can take up to 14 days to see final results from Dysport treatment. If after that time you still have not noticed an improvement visit with your injector for an evaluation. You may need a touch up or perhaps it's better to switch to a different neuromodulator.