What is a third class or behind the counter (BTC) class of drugs?
A third class or BTC class of drugs does not currently exist in the United States. In general, when most people talk about a third class of drugs, they are referring to a category of medicines available without a prescription, but only in pharmacies or through a pharmacist. Under this system, some nonprescription medicines would not be available in other convenient retail outlets, such as grocery stores without a pharmacy.
