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What is the difference between precision medicine and personalized medicine? What about pharmacogenomics?
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Precisionmedicine

What is the difference between precision medicine and personalized medicine? What about pharmacogenomics?

While often used interchangeably, precision medicine and personalized medicine have distinct nuances, with pharmacogenomics serving as a specialized component of the precision approach.

Understanding the Terminology

There is a significant amount of overlap between the terms precision medicine and personalized medicine. According to the National Research Council, personalized medicine is an older term with a meaning similar to precision medicine.

However, there was concern that the word "personalized" could be misinterpreted to imply that treatments and preventions are being developed uniquely for each individual. In precision medicine, the focus is on identifying which approaches will be effective for which patients based on genetic, environmental, and lifestyle factors. Consequently, the Council preferred the term precision medicine, though some individuals continue to use the two terms interchangeably.

The Role of Pharmacogenomics

Pharmacogenomics is a part of precision medicine. It is the study of how genes affect a person’s response to particular drugs. This relatively new field combines two disciplines:

  • Pharmacology: The science of drugs.
  • Genomics: The study of genes and their functions.

By combining these fields, researchers aim to develop effective, safe medications and doses that are tailored to variations in a person’s genes.

Frequently Asked Questions

Pharmacogenomics is a core component of precision medicine that studies how a person’s DNA influences their response to specific drugs. By identifying genetic variants that affect drug metabolism, efficacy, or toxicity, clinicians can choose the right medication and dose for a patient’s genetic profile, thereby improving safety and effectiveness.
Precision medicine integrates genomic data (DNA, RNA, protein), clinical information from electronic health records, imaging, environmental exposures, and lifestyle factors. Advanced analytics and machine learning models synthesize these data streams to predict which therapies will be most effective for a given patient group.===
Precision medicine groups patients into subpopulations based on shared genetic, environmental, or lifestyle markers and then selects the most effective therapy for that group. Personalized medicine, on the other hand, implies a unique plan for each individual; in practice it often overlaps with precision medicine but can be misleading because it suggests a one‑to‑one approach that is rarely feasible in routine care.
Most precision medicine studies aim to identify treatments that work best for defined patient subgroups rather than creating a unique plan for each participant. You may receive a therapy that is specifically matched to your genetic or biomarker profile, but it will still be one of several options used for that subgroup.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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