The safety profile of KYBELLA® is well characterized. The most common side effects are swelling, bruising, pain, numbness, redness and areas of hardness around the treatment area. KYBELLA® can cause serious side effects, including trouble swallowing and nerve injury in the jaw that can cause an uneven smile or facial muscle weakness.(2) These are not all of the possible side effects of KYBELLA®. Call your healthcare provider for medical advice about side effects.