The Food and Drug Administration has approved onabotulinumtoxinA (Botox) for treatment of pediatric lower limb spasticity in patients aged 2-17 years, excluding those in whom it is associated with cerebral palsy, according to an announcement from Allergan.
Olivier Le Moal/Getty Images
The approval is based on a phase 3 study evaluating safety and efficacy in more than 300 patients with lower limb spasticity. Although patients with cerebral palsy were included in the study, they’re excluded from this indication. Orphan Drug Exclusivity prevents it from being indicated for lower limb spasticity in cerebral palsy because abobotulinumtoxinA (Dysport) already has marketing exclusivity for the indication. Botox also is indicated for children aged 2-17 years of age with upper limb spasticity, as well as nine other indications.
OnabotulinumtoxinA comes with warnings, including problems of swallowing, speaking, or breathing and even risk of spread of the toxin. It also may cause loss of strength or general muscle weakness, vision problems, or dizziness within hours or weeks of administration. Serious and sometimes immediate allergic reactions have been reported. Patients and health care professionals should discuss various concerns before treatment, including whether the patient has recently received antibiotics by injection, or has taken muscle relaxants, allergy or cold medicine, sleep medicine, and aspirinlike products or blood thinners. It’s important to note that the dose of onabotulinumtoxinA is not the same as that for other botulinum toxin products. The full prescribing information is available on the Allergan website.