Therapeutic Use of Type F Botulinum Toxin

Abstract
Intramuscular injection of type A botulinum toxin alleviates the symptoms of several movement disorders, with few adverse effects.1 2 3 4 5 6 In disorders such as torticollis, the large doses used may result in the development of antibodies and patients' becoming unresponsive to treatment.7 , 8 We report the use of another type of botulinum toxin, type F, in four patients.