About botulinum toxin type a
Botulinum neurotoxin type A
Used for
- Treats muscle spasticity, cervical dystonia, and certain eye muscle disorders
- Prevents chronic migraine in adults
- Treats severe underarm sweating and overactive bladder
- Temporarily reduces facial frown lines
Usual adult dose
Doses vary widely by condition and injection site; administered by trained clinicians using product-specific units.
Usual dose in children
For certain conditions, specialists use weight-based dosing for children aged 2 years and older; doses vary by condition.
Common side effects
- Injection-site pain, bruising, or weakness
- Headache or flu-like symptoms
- Drooping eyelid or facial weakness
- Dry eyes or difficulty swallowing
Important warnings
- Effects can spread beyond the injection area, causing weakness, swallowing or breathing problems.
- Risk is higher with certain nerve or muscle disorders.
- Avoid use with infection at the planned injection site.
- Units are product-specific and must not be converted between botulinum toxin products.
Pregnancy
Human pregnancy data are limited; use only when clearly needed after weighing potential risks.
Breastfeeding
It is unknown whether this medicine passes into breast milk; discuss use with a healthcare professional.
Interactions
- Aminoglycoside antibiotics and other drugs affecting nerve-muscle signaling may increase weakness.
- Muscle relaxants may increase weakness.
- Other botulinum toxin products may increase effects.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.