Treatment o phonic tics in patients with tourette's syndrome using botulinum toxin type a.

A study by Porta et. al (2004), showed that the injection of Botulinum toxin Type A (2.5 IU BTX-A (BOTOX; Allergan)) in both vocal cords of Tourette patients improved the vocal tics in 93% of the patients after the tretment, with 50% of them being tic-free. The mean response time was 5.8 days, while the mean duration of response reached up to 102 days. A side effect of the treatment however, was hypophonia (experienced by 80% of the patients). Hypophonia refers to soft speech often resulting from lack of vocal muscle coordination.

Hold on to his or her beliefs even if there is no evidence for those beliefs.