The Danish National Prescription Registry (DNPR) is a comprehensive database that records all prescription drugs dispensed in Denmark since 1994. Maintained by the Danish Medicines Agency, the DNPR includes individual-level data on prescriptions, with detailed information on the drug user, prescriber, and pharmacy. The registry is unique in providing such detailed data for an entire nation and has been widely used for pharmacoepidemiological research. Key features of the DNPR include: 1. **Content**: The registry contains information on all prescriptions, including those for long-term care institutions, and includes variables such as drug user identification, prescriber details, drug characteristics, and pharmacy codes. 2. **Validity and Coverage**: The high-quality data is driven by reimbursement incentives and automated bar-code-based entry, ensuring detailed and accurate records. The unique personal identification number (CPR-number) allows for tracking individual prescription histories over time. 3. **Linkage Potential**: The DNPR can be linked to other nationwide individual-level data sources, enhancing its utility for research. The DNPR is a powerful tool for pharmacoepidemiological studies, though it does not include non-prescription drugs, hospital outpatient prescriptions, and prescriptions not redeemed. Despite minor changes, the registry remains a valuable resource for understanding drug use and prescribing behavior in Denmark.The Danish National Prescription Registry (DNPR) is a comprehensive database that records all prescription drugs dispensed in Denmark since 1994. Maintained by the Danish Medicines Agency, the DNPR includes individual-level data on prescriptions, with detailed information on the drug user, prescriber, and pharmacy. The registry is unique in providing such detailed data for an entire nation and has been widely used for pharmacoepidemiological research. Key features of the DNPR include: 1. **Content**: The registry contains information on all prescriptions, including those for long-term care institutions, and includes variables such as drug user identification, prescriber details, drug characteristics, and pharmacy codes. 2. **Validity and Coverage**: The high-quality data is driven by reimbursement incentives and automated bar-code-based entry, ensuring detailed and accurate records. The unique personal identification number (CPR-number) allows for tracking individual prescription histories over time. 3. **Linkage Potential**: The DNPR can be linked to other nationwide individual-level data sources, enhancing its utility for research. The DNPR is a powerful tool for pharmacoepidemiological studies, though it does not include non-prescription drugs, hospital outpatient prescriptions, and prescriptions not redeemed. Despite minor changes, the registry remains a valuable resource for understanding drug use and prescribing behavior in Denmark.