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Updated: May 24, 2026

Implementation of In Vitro Drug Resistance Assays: Maximizing the Potential for Uncovering Clinically Relevant Resistance Mechanisms
Published on: December 9, 2015
Overcoming regulatory and economic challenges facing pharmacogenomics
1Tufts Center for the Study of Drug Development, 75 Kneeland Street, Suite 1100, Boston, MA 02111, United States. Joshua.cohen@tufts.edu
Personalized medicine adoption faces barriers despite growth. Simultaneous development of therapeutics and companion diagnostics is hindered by regulatory and reimbursement challenges, limiting clinical utility evidence.
Area of Science:
- Biotechnology
- Genomics
- Pharmacology
Background:
- Personalized medicine and companion diagnostics have seen gradual growth since 2001.
- Despite advancements, adoption has not met the full potential envisioned after the human genome project.
- Significant clinical, regulatory, and economic hurdles impede widespread implementation.
Purpose of the Study:
- To examine the barriers to the clinical adoption of personalized medicines and companion diagnostics.
- To identify regulatory and economic challenges affecting the development and reimbursement of these targeted therapies.
- To propose strategies for overcoming obstacles to increase clinical integration.
Main Methods:
- Analysis of the current landscape of personalized medicine and companion diagnostic development.
- Review of regulatory processes for therapeutics and diagnostics.
- Examination of payer reimbursement policies and evidence requirements.
Main Results:
- Most personalized medicines are developed post hoc with separate companion diagnostics, not simultaneously.
- Complex regulatory pathways for diagnostics and lack of clear guidance contribute to this separation.
- Payer restrictions on reimbursement due to insufficient clinical utility evidence are a major barrier.
Conclusions:
- Simultaneous development of therapeutics and companion diagnostics is not the current norm.
- Clearer regulatory guidance and robust clinical utility evidence are crucial for increased adoption.
- Overcoming reimbursement barriers requires demonstrating the value of personalized approaches in clinical practice.
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