Why is Form 21B Important? The Form 21B license ensures that wholesalers maintain proper storage conditions (e.g., refrigeration for vaccines) and adhere to regulations for distributing temperature-sensitive drugs. Submitting complete and accurate documents is critical to avoid delays or rejection during the application process. Documents Required for Form 21B Drug License ... https://www.psrcompliance.com/blog/what-is-form-21b-drug-license