How BOTOX® works
To treat adults with cervical dystonia, BOTOX® blocks the nerve signals that cause muscle spasms. This helps reduce muscle stiffness and tension.¹
Muscle contractions associated with cervical dystonia are thought to be caused by nerve signals sent from the brain to the affected muscles, telling them to contract or spasm.²
BOTOX® works in the muscle where it is injected to block signals that tell the muscle to contract.¹
As a result, muscle contractions may be reduced.¹
Treatment once every 3 months
There is no daily treatment required with BOTOX®. Your specialist will administer BOTOX® treatments by injecting the medicine directly into affected muscles. You can get treated again after the effect of the previous injection has worn off, but no sooner than every 3 months.¹
Talk to your doctor today to see if BOTOX® may be right for you.
Possible side effects
The needles used for BOTOX® (onabotulinumtoxinA) injections are very fine, but you may experience some pain, swelling, and other reactions at the injection sites.¹
Some side effects of BOTOX® include difficulty swallowing, upper respiratory infection, neck pain, headache, increased cough, flu-like symptoms, back pain, inflammation of the nasal passages, dizziness, increased muscle tone or stiffness, soreness at injection site, general weakness/fatigue or lack of energy, oral dryness, speech disorder, fever, nausea, and drowsiness.
BOTOX® may cause serious side effects that can be life threatening. Call your doctor or get medical help right away if you have any of these problems any time (hours to weeks) after injection of BOTOX®:
- Problems swallowing, speaking, or breathing, due to weakening of associated muscles, can be severe and result in loss of life. You are at the highest risk if these problems are pre-existing before injection. Swallowing problems may last for several months.¹
- Spread of toxin effects. The effect of botulinum toxin may affect areas away from the injection site and cause serious symptoms including: loss of strength and all-over muscle weakness, double vision, blurred vision and drooping eyelids, hoarseness or change or loss of voice (dysphonia), trouble saying words clearly (dysarthria), loss of bladder control, trouble breathing, trouble swallowing.¹ If this happens, do not drive a car, operate machinery, or do other dangerous activities