Objective: To evaluate the effects of botulinum toxin type Afor the treatment of provoked vestibulodynia.
Study Design: Open-label, dose-escalation, pilot study. Primary outcome measure was a standard numeric pain rating scale of 0-10. Secondary measures were improvements in quality of life and change in medication use.
Results: The 7 patients who received 35 units of botulinum toxin type A had a baseline mean pain score (0-10) of 8.1 (SD = 0.70). Thirty days after treatment, these patients had a mean pain score of 2.9 (SD= 1.17). The duration of effect was 8 weeks, and there were no side effects. The 12 patients who received 50 units of botulinum toxin type A had a baseline mean pain score of 7.4 (SD = 0.10). Thirty days after treatment, these patients had a mean pain score of 1.8 (SD= 0.72). The duration of effect was 14 weeks, and there were no side effects. Significant improvement was also seen in medication use and quality of life for these patients.
Conclusion: This study provides further clinical evidence of the nociceptive effects of botulinum toxin type A in pelvic inflammatory pain-related disorders. Doubleblind, placebo-controlled trials to evaluate the efficacy of botulinum toxin in treating patients with provoked vestibulodynia are warranted.
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Toxins (Basel)
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