Valbenazine for tardive dyskinesia: A systematic review of the efficacy and safety profile for this newly approved novel medication-What is the number needed to treat, number needed to harm and likelihood to be helped or harmed?

Valbenazine is presently the only US Food and Drug Administration-approved agent specifically indicated for the treatment of TD. Valbenazine is about 15 times more likely to result in a response than in a discontinuation because of an adverse event. Head-to-head comparisons with other VMAT2 inhibitors among patients with TD in the 'real world' are needed.