KYBELLA can cause serious side effects, including nerve injury in the jaw that can temporarily cause an uneven smile or facial muscle weakness (experienced by 4 out of 100 people in clinical studies) and trouble swallowing (experienced by 2 out of 100 people in clinical studies). In clinical studies, nerve injury in the jaw resolved on its own in a median of 44 days (range of 1 to 298 days), and trouble swallowing resolved on its own in a median of 3 days (range of 1 to 81 days).
Side effects are usually temporary and often resolve on their own. The most common side effects occur in the treatment area and include:
Swelling
Bruising
Pain
Numbness
Redness
Areas of Hardness