Understanding Form 20 and Form 21 Licenses Form 20: Required for retail pharmacies selling prescription drugs (e.g., antibiotics) and over-the-counter medicines directly to consumers. Form 21: Needed for wholesalers distributing Schedule H and Schedule X drugs to retailers, hospitals, or clinics, with strict storage requirements for narcotics. Both licenses are ap... https://www.psrcompliance.com/blog/what-is-form-20b-drug-license