The most common side effects of Botox include: anxiety, headaches, drowsiness, dry mouth, dry eyes, flu-like symptoms, cough, nausea, neck pain, redness, swelling or pain at the injection site, light sensitivity, sweating, and muscle weakness at the site of injection. The severe complications include: allergic reaction (rash, hives, shortness of breath,), bleeding at injection site, difficulty with swallowing or breathing, double vision, fever, chills, loss of bladder control, fainting, eyelid droop, persistent muscle weakness, and worsened migraine headaches.
Contact your doctor immediately if you experience muscle weakness, loss of bladder control, trouble swallowing, or trouble talking. Botox Cosmetic may also cause serious allergic reactions or anaphylaxis. Get immediate emergency help if you experience a rash; itching; a hoarse throat; difficulty swallowing or breathing; or swelling of the face, mouth, or hands.
Other severe side effects of this drug include bleeding at the site of injection, blurred or distorted vision, chest pain, difficulty swallowing, eyelid drooping or swelling, fainting, flu-like symptoms, irregular heartbeat, paralysis, seizures, weakness, or speech problems. Less-serious side effects include back pain, dizziness, sleepiness, dry eyes or mouth, pain in your face or neck, back pain, irritation at the injection site, runny nose, light sensitivity, weak muscles around the injection site, anxiety, mild fever or achiness, nausea, cough, or indigestion. See your doctor if these side effects persist or worry you.
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.