Legal Definitions - proprietary drug

A proprietary drug is a type of medication that is manufactured and sold by a specific company under a brand name. These drugs are protected by patents, which means that other companies cannot produce or sell the same medication under the same name.

Advil is a proprietary drug that is used to relieve pain and reduce fever. It is manufactured by Pfizer and is only available under the Advil brand name. Other companies can produce generic versions of the same drug, but they must use a different name.

This example illustrates how a proprietary drug is a medication that is owned and sold by a specific company under a brand name. It also shows how patents protect these drugs from being copied by other companies.