Abstract
Valproic acid, a histone deacetylase inhibitor, has beneficial effects in the setting of cancer, neurologic diseases, and traumatic injuries. In animal models of traumatic injury, a single dose of valproic acid has been shown to reduce mortality. The purpose of this trial was to determine the maximum tolerated single dose of intravenous valproic acid in healthy humans. A double-blinded, placebo-controlled, dose-escalation trial design was used to identify dose-limiting toxicities in healthy subjects who received a single dose of intravenous valproic acid. Patients were monitored for adverse events and data were collected for pharmacokinetic, pharmacodynamic, and safety profiling of valproic acid. Fifty-nine healthy subjects (mean 30 ± 12 years) were enrolled. Forty-four subjects received valproic acid in doses from 15 to 150 mg/kg. The most common adverse events were hypoacusis (n = 19), chills (n = 18), and headache (n = 16). The maximum tolerated dose was 140 mg/kg. Dose-limiting toxicities included headache and nausea lasting longer than 12 h. No drug-related abnormalities were seen in other safety measures including laboratory tests, hemodynamic parameters, cardiac rhythm monitoring, and cognitive testing. A two-compartment...Continue Reading
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