Proprietary drugs are a medication that is owned and sold by a particular company or manufacturer. They are often referred to as brand name drugs. Synonyms for proprietary drugs include patented drugs, trademarked drugs, and brand drugs. These drugs are created by pharmaceutical companies and have exclusive rights to distribute and sell them. Other synonyms include licensed drugs, distinctive drugs, and trademark drugs. These drugs are the opposite of generic drugs, which are not owned by any specific company and can be made and marketed by any pharmaceutical company. Proprietary drugs are known for their higher cost, as they are heavily marketed and have a larger research and development cost.