The present invention describes materials and methods related to synthetic peptides which block the secretion of neurotransmitters and induce muscle relaxation, and use of said peptides as inhibitors of neurotransmitter secretion and muscle contraction, and as inducers of muscle relaxation.本發明闡述與阻斷神經傳導物分泌並誘發肌肉鬆弛之合成肽有關之材料與方法,以及該等肽作為神經傳導物分泌及肌肉收縮抑制劑及作為肌肉鬆弛誘發劑之用途。