Accutane impedes wound healing. Kybella dissolves fat but does not create trauma to the skin so this treatment should be fine.
You can get Kybella while on Accutane. Kybella is good for dissolving fat under the chin, but a combination approach is needed to get the most improvement with non-invasive options. I recommend Kybella with thermage, ultherapy, exilis. VASER liposuction in combination with ThermiRF is an alternative for contouring the chin, if you're a candidate. I recommend getting a formal evaluation with a cosmetic dermatologist. Best, Dr. Emer