SEATTLE, Wash and VANCOUVER, British Columbia, May 15, 2019 — Achieve Life Sciences, Inc. (Nasdaq: ACHV), a clinical-stage pharmaceutical company committed to the global development and commercialization of cytisinicline for smoking cessation, today provided an update on the cytisinicline clinical development program and announced first quarter 2019 financial results.

ORCA-1 Trial Status
Achieve’s 254-subject Phase 2b ORCA-1 trial of cytisinicline in U.S. smokers completed enrollment in February. The Company announced recently that the last study visit for the last subject enrolled in the ORCA-1 trial has occurred. The trial is evaluating cytisinicline in both the 1.5 mg and 3.0 mg doses on a declining titration schedule as well as three times daily dosing, both over 25 days. The primary efficacy endpoint is reduction in the number of cigarettes smoked during treatment with secondary analyses to be conducted on smoking cessation rates, safety, and compliance. ORCA-1 topline efficacy and safety data are expected to be announced by the end of the second quarter.

Maximum Tolerated Dose (MTD) Trial Extension
Achieve recently initiated a trial to assess the MTD for a single administered oral dose of cytisinicline in smokers. The starting dosage of cytisinicline was 6 mg and is increased in separate groups of subjects for each escalated dose level until stopping criteria, based on the occurrence of dose-limiting adverse events, are reached. To date, 21 mg cytisinicline has been evaluated without evidence of dose limiting toxicity. The trial’s Data Safety Monitoring Committe