Duration of Forehead Wrinkle Botox Effects and Retouching Timing

I have a habit of constantly raising my eyebrows whenever I concentrate on work, so before wrinkles set in deeply... Botox We plan to treat it with a procedure. Typically, it involves the domestic Meditoxin or Daewoong Botox On average, how long does the effect of tightening the forehead muscles last after receiving the injection? I heard that you need to get it again when the effect wears off to prevent wrinkles from deepening. Botox I am wondering what the appropriate retouching cycle is. I am also curious if Maypure ensures the authenticity of the product, and I would like to know in advance if there is any risk of ptosis (drooping eyelids) after the procedure. I would like to maintain the results comfortably without any side effects for the duration of the effect.