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Cardiovascular Profile of Valbenazine: Analysis of Pooled Data from Three Randomized, Double-Blind, Placebo-Controlled Trials

Dao Thai-Cuarto (), Christopher F. O’Brien, Roland Jimenez, Grace S. Liang and Joshua Burke
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Dao Thai-Cuarto: Neurocrine Biosciences, Inc.
Christopher F. O’Brien: Neurocrine Biosciences, Inc.
Roland Jimenez: Neurocrine Biosciences, Inc.
Grace S. Liang: Neurocrine Biosciences, Inc.
Joshua Burke: Neurocrine Biosciences, Inc.

Drug Safety, 2018, vol. 41, issue 4, No 10, 429-440

Abstract: Abstract Introduction Valbenazine is a novel vesicular monoamine transporter 2 inhibitor approved for the treatment of tardive dyskinesia in adults. Objective Using data from double-blind, placebo-controlled trials, analyses were conducted to evaluate the cardiovascular effects of once-daily valbenazine in patients with a psychiatric disorder who developed tardive dyskinesia after exposure to a dopamine-blocking medication. Methods Data were pooled from three 6-week, double-blind, placebo-controlled trials: KINECT (NCT01688037), KINECT 2 (NCT01733121), and KINECT 3 (NCT02274558). Data from the 42-week valbenazine extension period of KINECT 3 were also analyzed. Outcomes of interest included cardiovascular-related treatment-emergent adverse events, vital sign measurements, and electrocardiogram parameters. Results The pooled safety population included 400 participants (placebo, n = 178; valbenazine 40 mg/day, n = 110; valbenazine 80 mg/day, n = 112). A history of cardiac disorders was present in 11.8% of participants, and 74.3% were taking a concomitant medication with known potential for QT prolongation. Mean changes from baseline to week 6 in supine vital signs and QTcF (Fridericia correction) were as follows for placebo, valbenazine 40 mg/day, and valbenazine 80 mg/day, respectively: systolic blood pressure (0.2, − 2.1, − 1.8 mmHg), diastolic blood pressure (− 0.1, − 1.6, − 1.2 mmHg), heart rate (− 1.7, − 2.2, − 1.7 bpm), QTcF interval (1.2, 1.1, 2.1 ms); all p > 0.05 for valbenazine vs. placebo. No statistically significant differences were observed between placebo and valbenazine in cardiovascular-related, treatment-emergent adverse events. No notable additional effects on cardiovascular outcomes were found with up to 48 weeks of valbenazine treatment. Conclusions Results from double-blind, placebo-controlled trials showed no apparent difference between valbenazine and placebo on cardiovascular outcomes. No additional cardiovascular risk was detected during a longer extension study with valbenazine.

Date: 2018
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DOI: 10.1007/s40264-017-0623-1

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