When Botox isn't enough for frown lines, can hyaluronic acid be applied afterward as a compliment, to improve results? (Photos)

Botox often needs a little filler to fully get rid of the creases when the botox isn't enough.  You can do them on the same day if you want.

Yes, once the Botox has taken full effect and weakened the muscle sufficiently if there is still lines present at rest they can be further softened with fillers. They can be improved, but may not be fully erased. Sometimes a resurfacing treatment is also added to further improve. This is a high risk area for injection of fillers because of the blood supply, so make sure you are under the care of an experienced physician provider to minimize the risks of complications.