Botulinum toxin type A for refractory post-stroke shoulder pain.

Botulinum toxin type A (BTX-A) has been used to treat several neurological conditions such as sialorrhea, hyperhydrosis, dystonia, hemifacial spasm, spasticity and pain. Although spasticity has been successfully treated with BTX-A, few are the authors studying the use of BTX-A to treat shoulder pain secondary to stroke. In order to study if BTX-A is effective to treat post-stroke shoulder pain, we followed up during 4 months 16 patients with sustained shoulder pain.

Does botulinum toxin improve the function of the patient with spasticity after stroke?

Post-stroke spasticity is an important cause of disability in adults, due to muscle hyperactivity, which results in limb stiffness and muscle spasm. The prognosis for these patients depends on several features such as early management and adequate physical therapy to avoid muscle shortening, pain, and their consequences. Although several papers have shown that intramuscular injections of botulinum toxin type A (BT-A) decreases spasticity in post-stroke patients, few authors have demonstrated functional improvement after this therapy.

Botulinum toxin type A for the treatment of the upper limb spasticity after stroke: a meta-analysis.

Muscle over-activity is one of the cardinal features of spasticity and it is a common disability of stroke patients. In this group, spasticity is responsible for several limitations that interfere in their daily activities and quality of life. To treat spasticity, neurologists usually prescribe drugs as baclofen, tizanidine or benzodiazepines or even use definitive treatment as phenol or surgery.