Botox: Uses and Side Effects

Botox (onabotulinumtoxinA) is made from the bacteria that causes botulism. Botulinum toxin blocks nerve activity in the muscles.

Botox is used in adults to treat cervical dystonia (severe spasms in the neck muscles), or muscle stiffness in the elbows, wrists, fingers, ankles, or toes. It is also used to treat severe underarm sweating (hyperhidrosis).

Botox is also used in adults to treat overactive bladder and incontinence (urine leakage) caused by nerve disorders such as spinal cord injury or multiple sclerosis.

Botox is also used in adults to prevent chronic migraine headaches in adults who have migraines for more than 15 days per month, each lasting 4 hours or longer. This medicine should not be used to treat a common tension headache.

Botox is also used to treat certain eye muscle conditions caused by nerve disorders in adults and children who are at least 12 years old. This includes uncontrolled blinking or spasm of the eyelids, and a condition in which the eyes do not point in the same direction.


Side Effects

Common Botox side effects may include:

  • muscle weakness near where the medicine was injected;
  • trouble swallowing for several months after treatment;
  • muscle stiffness, neck pain, pain in your arms or legs;
  • blurred vision, puffy eyelids, dry eyes, drooping eyebrows;
  • dry mouth;
  • headache, tiredness;
  • increased sweating in areas other than the underarms; or
  • bruising, bleeding, pain, redness, or swelling where the injection was given.


Keywords: Botox; onabotulinumtoxinA .

* The Content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.