Shares of Suven Life Sciences jumped more than 4 per cent after the company announced dose administration of the first patient in a Phase 2A clinical trial of SUVN G-3031, a Histamine H3 receptor inverse agonist in a double-blind, placebo-controlled, parallel-group, multicenter study to evaluate the safety, tolerability, pharmacokinetics, and efficacy of 2 mg and 4 mg SUVN-G3031 compared to placebo in patients with narcolepsy with or without cataplexy.