Botox, and maybe filler too

Botox will address the "dynamic" wrinkles that occur with muscle movement but not the "static" wrinkle in that location.  Fillers, e.g. Juvederm or Restylane can be injected to that vertical line to fill it in.  If you do not lapse in your Botox injections, eventually the "static" vertical line will iron itself out after a few months.  Botox and filler can be administered to this location at the same time for convenience, but ideally you would have Botox injected first, then filler 2 weeks later when there is minimal muscle activity in that area.

Good luck.