title: Therapeutic efficacy and safety of botulinum toxin type A in trigeminal neuralgia: a systematic review.
abstract: Trigeminal neuralgia is a common disorder caused mainly by compression of the trigeminal nerve root by an overlying blood vessel. Pharmacotherapy and surgery are ineffective or unsuitable in many patients. Therefore, other therapeutic modalities have been tried, including injection of botulinum toxin type A (BTX-A). This study aims to systematically review the therapeutic efficacy and safety of BTX-A in trigeminal neuralgia. PubMed, EMBASE, Cochrane Library Clinical Trials and Web of Science from January 1966 to March 2013 were searched with the terms of "botulinum toxin" AND "trigeminal neuralgia", and references of related articles were traced. Data on the efficacy and safety of BTX-A in this disorder were extracted and analyzed by at least 2 reviewers. Data for individual studies were reported, and pooled data were analyzed if appropriate. Five prospective studies and one double-blind, randomized, placebo-controlled study were identified. Response was achieved in approximately 70-100% of patients, and the mean pain intensity and frequency were reduced by approximately 60-100% at 4 weeks after treatment in most studies. Major adverse events were not reported. Available studies show BTX-A may be effective in treatment of trigeminal neuralgia. However, well-designed randomized, controlled, double-blinded trial is still lacking. Future BTX-A treatment studies on optimal dose, duration of the therapeutic efficacy, common AEs, and the time and indications for repeat injection would be promising.
authors: Yong
authors: Y
authors: Hu
authors: Xiaofei
authors: X
authors: Guan
authors: Lin
authors: L
authors: Fan
authors: Mu
authors: M
authors: Li
authors: Yiteng
authors: Y
authors: Liao
authors: Zhiyu
authors: Z
authors: Nie
authors: Lingjing
authors: L
authors: Jin
mesh_terms: D019274:Botulinum Toxins, Type A / Q000009:adverse effects* / Q000627:therapeutic use*; D006801:Humans; D016032:Randomized Controlled Trials as Topic; D014277:Trigeminal Neuralgia / Q000188:drug therapy*
chemical_list: D019274:Botulinum Toxins, Type A
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