Autonomic function after botulinum toxin type A or B: a double-blind, randomized trial.

Tintner, R; Gross, R; Winzer, U F; Smalky, K A; Jankovic, J · Neurology · 2005

rct · Level II

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Abstract

To compare autonomic effects of botulinum toxin (BTX), we randomized patients with cervical dystonia to receive either BTX-A or BTX-B in a double-blind manner. Efficacy and physiologic questionnaire measures of autonomic function were assessed at baseline and 2 weeks after injection. Patients treated with BTX-B had less saliva production (p < 0.01) and greater severity of constipation (p = 0.037) than those treated with BTX-A, but did not differ in other tests of autonomic functions.

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