For the neck, microinjections of Botox between 1-2 units at each site works extremely well at smoothing those wrinkles. Each neck is different, so the total amount will vary and would be at the discretion of the injector.
20-30 units is usually sufficient for treatment of banding in the neck. However, you would require an in person evaluation to determine the best approach. I hope this information is helpful.Stephen Weber MD, FACS