FPGEE for National Association of Boards of Pharmacy (NABP) Practice Exam 2026 - Free NABP Practice Questions and Study Guide

The Medication Possession Ratio (MPR) is a metric used to assess patient adherence to prescribed medications. It is calculated by taking the sum of all days' supply of medications a patient has within a specified time period and dividing that by the total number of days in that same period. This measure helps to determine how much medication a patient has access to compared to what is expected over the given timeframe.

This method provides an accurate reflection of a patient’s medication availability and adherence. A higher MPR indicates better adherence to the prescribed regimen, suggesting that the patient is consistently obtaining and potentially taking their medications as prescribed over the examined timeframe.

In comparison, the other options do not accurately reflect the MPR calculation. Options focusing on the number of patients, total prescriptions, or the number of medications do not directly measure the ratio of available medication over time. Thus, combining the sum of the days' supply against the overall number of days is essential for understanding medication adherence effectively.