Vistabex is a botulinum toxin type A product. The substance is also famous as Botox or Vistabel. The drug is produced by Allergan, a popular global pharmaceutical company focused on developing pharmaceutical products including botulinum toxin-based drugs for patients around the world. How does Allergan Vistabex work? Vistabex is an injectable remedy that is prescribed by doctors for patients to treat: cervical dystonia; severe spasms of the neck, hands, and arms; hyperhidrosis (excessive sweating); mimic wrinkles; eye nerve disorders; overactive bladder or urine leakage; migraines and chronic headaches.