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Post-marketing surveillance is a critical component of pharmaceutical regulation, often uncovering unanticipated adverse drug reactions (ADRs) once a drug is widely used over an extended period.
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Analysis of population pharmacokinetic data involves studying the behavior of drugs within diverse populations to understand their pharmacokinetic parameters. Traditional pharmacokinetic methods typically involve collecting samples from a few individuals and estimating these parameters. While these methods are commonly used, they have limitations in capturing the variability in drug response among individuals or heterogeneous populations. Population pharmacokinetics is employed to address these...
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Vulnerability Index Approach to Identify Pharmacy Deserts and Keystone Pharmacies.

Walter S Mathis1, Lucas A Berenbrok2, Peter A Kahn3

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Millions of Americans live in pharmacy deserts, especially in rural areas. A new pharmacy vulnerability index highlights areas at risk, emphasizing the need for policy interventions to ensure equitable access to essential pharmacy services.

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Area of Science:

  • Public Health
  • Health Equity
  • Geographic Information Systems (GIS) Analysis

Background:

  • Community pharmacies are vital for public health, offering services like medication dispensing and vaccinations.
  • Disparities in pharmacy access disproportionately affect underserved rural and low-income populations, impacting health equity.

Purpose of the Study:

  • To develop a novel pharmacy vulnerability index to identify U.S. areas at risk of becoming pharmacy deserts.
  • To analyze geographic disparities in pharmacy access and identify vulnerable populations.

Main Methods:

  • A population-based, cross-sectional study using geographic information systems (GIS) analysis of U.S. community pharmacy data.
  • Defined pharmacy deserts based on travel time to the nearest pharmacy exceeding supermarket access time.
  • Developed a pharmacy vulnerability index to quantify the risk of a census tract becoming a pharmacy desert.

Main Results:

  • 17.7% of the contiguous U.S. population (57.1 million individuals) live in pharmacy deserts.
  • 8.9% of the population (28.9 million) rely on a single pharmacy for access.
  • Small rural areas showed a higher dependency on single pharmacies, affecting 14.3% of individuals in these regions.

Conclusions:

  • Significant disparities in pharmacy access exist in the U.S., particularly in small rural areas.
  • A substantial portion of the population lives in pharmacy deserts or relies on a single pharmacy.
  • Targeted policy interventions, including financial incentives, are crucial to sustain pharmacies in at-risk areas and ensure equitable access.