American journal of physical medicine & rehabilitation
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Am J Phys Med Rehabil · Oct 2002
Randomized Controlled Trial Clinical TrialBotulinum toxin type A use in piriformis muscle syndrome: a pilot study.
This study was undertaken to test the hypothesis that intramuscular botulinum toxin type A decreases chronic pain attributed to piriformis muscle syndrome to a greater extent than a similar injection with vehicle (saline) alone. ⋯ VAS data suggest that intramuscular piriformis injection with 100 units of botulinum toxin type A can reduce pain to a greater extent than similar injections with vehicle alone.