Phase 2 multicenter, open-label, single-arm study is designed to evaluate the efficacy, safety, and tolerability of ibezapolstat in the treatment and reduction of recurrence of CDI in an adult patient population that has experienced ≥3 episodes of CDI within the past 12 months. Up to 20 participants will be treated with ibezapolstat 450 mg taken with food every 12 hours for 14 days (28 total doses) and followed for Clinical Cure (Day 16), Sustained Clinical Cure (Day 42), rate of CDI recurrence (Up to Week 24), and Extended Clinical Cure (ECC) (Up to Week 24).