The official nonproprietary drug name assigned by a manufacturer is the

Answer

The correct answer is "generic name." **Explanation:** In pharmacology, drugs can have multiple names, but they are primarily categorized into two main types: proprietary (or brand) names and nonproprietary (or generic) names. 1. **Chemical name**: This is a scientific name that describes the chemical composition and molecular structure of the drug but is not commonly used in practice. 2. **Generic name**: This is the official nonproprietary name given to a drug, which is used universally to identify the drug regardless of the manufacturer. 3. **Official name**: This usually refers to the name that is recognized by regulatory authorities but can often be synonymous with the generic name. In most contexts, when referring to the drug name assigned by the manufacturer that is nonproprietary, the term used is the "generic name." 4. **Brand or trade name**: This is the name given by a specific manufacturer for the drug, often trademarked and used for marketing purposes. Thus, the answer is "generic name," as it is the term used to identify the drug universally, irrespective of the manufacturer.