Drug utilization review, or DUR, is a systematic process of evaluating prescriptions for potential problems before, during, or after they are filled, and it operates largely through automated software checks built into modern pharmacy systems.
Prospective DUR
Prospective DUR happens at the point of dispensing, before the medication reaches the patient. Pharmacy software automatically screens for drug interactions, duplicate therapy, incorrect dosing, and allergy conflicts as soon as a prescription is entered, generating an alert that interrupts the normal workflow until it is addressed.
Retrospective DUR
Retrospective DUR looks backward at patterns of prescribing and dispensing over time, often used by insurers or health systems to identify trends such as overuse of a particular drug class or gaps in therapy across a larger patient population, informing broader quality improvement initiatives rather than a single prescription.
The Technician Role
Technicians usually see the results of prospective DUR as pop-up alerts during data entry. These alerts must be resolved by the pharmacist, and technicians should never override or dismiss a DUR alert on their own, even when the alert seems minor or the technician has seen the same alert dismissed many times before for other patients.
Putting This Into Practice
A useful way to reinforce this material is to imagine how it would come up during an actual shift, whether at a retail counter or in a hospital setting. Picturing a concrete, realistic situation tends to make the underlying concept stick far better than memorizing it as an abstract rule.
A Final Thought
Some candidates find it useful to explain a concept like this out loud to a friend or family member with no pharmacy background, since simplifying the explanation for a general audience often reveals which parts you truly understand and which parts still feel shaky. A short mental checklist, built from the main points covered here, can be a fast way to review this topic again in the final days before your exam without needing to reread the entire discussion from scratch.
DUR is one of the clearest examples of how pharmacy software acts as a safety net, catching problems a busy pharmacy team might otherwise miss during a hectic shift.