General Document Requirements for All Drug Licenses The following documents are commonly required across all categories of drug license applications: 1. Duly Filled Application Form Depending on license type: Form 19 for general drug license Form 20/21 for retail Form 20B/21B for wholesale Form 24/25/27/28 for manufacturing 2. Covering Letter Addressed to the Drug... https://www.psrcompliance.com/drug-license-registration