When does a Class B drug become a Class A?

• A. When they are used medicinally under license.
• B. When they are produced in large quantities.
• C. When they are prepared for injections.
• D. When they are imported.

Answer: (C)

Drug control schedules depend on the form and method of use because different forms carry different levels of risk. A Class B drug becomes Class A when it is prepared for injection because turning it into an injectable formulation increases the potential for rapid, harmful effects and misuse. The law treats injectable preparations as carrying greater risk, so the classification is elevated to Class A to reflect the higher harm potential and to impose stricter controls and penalties.

Using the drug medicinally under license doesn’t change its schedule, and production in large quantities or importing the drug doesn’t by themselves change its class. The key trigger is the act of preparing the Class B drug for injection.