3.0 mg, 3 times daily selected as dose for future clinical development

SEATTLE, Wash. and VANCOUVER, British Columbia, June 11, 2019 — Achieve Life Sciences, Inc. (Nasdaq: ACHV), a clinical-stage pharmaceutical company focused on nicotine addiction, today announced positive results from the ORCA-1 dose-selection trial of cytisinicline for smoking cessation. The outcome of the 254-subject, ORCA-1 trial is the selection of 3.0 mg, three times daily (TID) for Phase 3 development.

The primary endpoint was the reduction in daily smoking, a self-reported measure. Three of the four cytisinicline treatment arms demonstrated a statistically significant improvement, as defined in the protocol as p < 0.05, compared to placebo. The fourth arm trended to significance (p= 0.052). Across all treatment arms, over the 25-day treatment period, subjects on cytisinicline experienced a 74-80% median reduction in the number of cigarettes smoked, compared to a 62% reduction in the placebo arms.

The secondary endpoint of the trial was a 4-week continuous abstinence rate, which is the relevant endpoint for regulatory approval. Cytisinicline treatment showed significant improvements in abstinence rates compared to placebo. The most impressive results were observed in the 3 mg TID treatment arm which demonstrated a 54% abstinence rate at week 4, compared to 16% for placebo (p < 0.0001) and a continuous abstinence rate, weeks 5 through 8, of 30% for cytisinicline