Using 25 Units Max In The Glabella, What Are The Best Spots For Botox Injection?

It is important that you have an experienced doctor evaluate you in order to achieve the results you are looking for.  If you have a particularly low-set brow, care must be taken not to further drop the brow.  Treatment of the forehead at the same time will definitely change one's strategy based on the interplay of the two areas with regards to brow position.  That being said, I typically treat with 20-25 units divided between the midline, head of each brow, near a line even with the medial limbus (inside edge of colored part of eye) at top of brow, and top of brow even with pupil. That is average, but there can be considerable variation in location and dosage depending on muscle bulk, strength, brow position, etc.  This isn't for the person without proper training...
 

When treating the glabella region with Botox, 2 groups of muscles are injected.  The procerus muscle creates a horizontal line across the bridge of the nose.  The corrugator muscles lie somewhat parallel to and above the eyebrows and create vertical lines between the brows.   On average 25 unitsis used with 1 injection to the procerus and 2 injections to each corrugator muscle for a total of 5 injections.