Can glabella botox lift medial/inner brows?

Yes, Botox to the corrugator muscle(medial brow muscle that causes vertical frown lines) can elevate the medial eyebrows a small amount. The action of this muscles pulls the eyebrow medially and downward. When this muscle action is blocked by Botox, the medial edge of the brow will move a bit upward and outward which opens up this area and looks more youthful.

Appropriate Botox treatment between the eyebrows will weaken the brow depressor muscles creating a subtle lift in the inner portion of the brow. However, an inexperienced injector can easily direct those injections too high which can result in a droop of the medial brow. For this reason, seek an experienced Plastic Surgeon, Oculoplastic Surgeon or Dermatologist injector. I hope this information is helpful.Stephen Weber MD, FACSDenver Facial Plastic Surgeon

When the glabella is treated, two muscles are being relaxed: the corrugator and the procerus.  The corrugator creates vertical wrinkles in the glabella, while the procerus creates horizontal wrinkles.  Both of these muscles depress the medial brow, so relaxing these muscles does elevate the medial brow.