Will I experience any side effects?

- FAQ Botox® Cosmetic

The most common side effects following injection include temporary eyelid droop and nausea. Localized pain, infection, inflammation, tenderness, swelling, redness, and/or bleeding/bruising may be associated with the injection. Patients with certain neuromuscular disorders such as ALS, myasthenia gravis, or Lambert-Eaton syndrome may be at increased risk of serious side effects.