Myobloc (Botulinum Toxin Type B) for Muscle Spasms and Dystonia
Myobloc is an injectable botulinum toxin that temporarily reduces excessive muscle activity. It is used to treat cervical dystonia, adult spasticity, and upper-limb spasticity in children age 2 and older.
Myobloc can help reduce troublesome muscle tightness or spasms when other treatments are not enough. It must be given by a trained healthcare professional using a personalized dose and injection plan.
Key facts at a glance
- RxNorm
- 284792
- Generic
- Myobloc
- Class
- brand-name
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed July 26, 2026. · Read our editorial policy