Randomized controlled study of the efficacy of the injection of botulinum toxin type A versus corticosteroids in chronic plantar fasciitis: results at one and six months.

Objective: To determine the efficacy of botulinum toxin type A in chronic plantar fasciitis compared to the local injection of a corticosteroid plus local anaesthetic.

Methods: Patients with a clinical diagnosis of plantar fasciitis made at least six months earlier were selected to enter a randomized, single-blind study of treatment with injections of botulinum toxin type A or corticosteroid. There were 28 patients in each treatment group.