Phase 3 Trial Evaluating the Efficacy and Safety of Cytisinicline for Vaping Cessation in Adults Using Nicotine-Containing E Cigarettes

This will be a multi-center, double-blind, randomized, placebo-controlled, Phase 3 study conducted in male or female adults who are daily nicotine e-cigarette users only. A total of approximately 800 subjects will be randomly assigned (1:1) to one of two Arms: * Arm B, 12 weeks cytisinicline + behavior support: N=400 or * Arm A, 12 weeks of placebo+ behavior support: N=400) The primary objective is to assess whether subjects randomized to Arm B (3 mg cytisinicline TID for 12 weeks plus behavioral support) have a higher probability of nicotine vaping cessation from Week 9 to Week 12 as compared to subjects randomized to Arm A (placebo TID for 12 weeks plus behavioral support).