Clinical Trial to Compare the Safety and Efficacy of Botulax® Versus Botox® in Patients With Cervical Dystonia

A Multi-center, Double-blind, Randomized, Parallel, Active-controlled, Phase I Clinical Trial to Compare the Safety and Efficacy of Botulax® Versus Botox® in Patients With Cervical Dystonia

To determine the efficacy and safety of Botulax® in treatment of cervical dystonia

Inclusion Criteria:

1. Male or female of aged over 19 years
2. Subjects diagnosed with primary cervical dystonia

Exclusion Criteria:

1. Subjects who have administered botulinum toxin within 16 weeks at the time of baseline
2. Pregnant or nursing
3. Females or males who do not agree on proper contraceptive measure