# Genetic testing and personalized drug safety

> How pharmacogenomic testing can identify patients at higher risk for certain drug reactions.

**Canonical URL:** https://drugsmonitor.com/guides/genetic-testing-and-drug-safety
**Last updated:** 2026-06-11

Pharmacogenomics studies how a person's genetic makeup affects their response to drugs. Genetic variations can influence drug metabolism, efficacy, and toxicity risk for many commonly prescribed medications.

For example, patients with certain HLA gene variants are at higher risk for severe skin reactions from allopurinol or abacavir. CYP450 enzyme variants affect how patients metabolize antidepressants, blood thinners, and pain medications.

Discuss pharmacogenomic testing with your provider if you have had unexpected drug reactions or if multiple medications in your class have not been effective. This personalized approach is an emerging area in drug safety.

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*Educational guide from DrugsMonitor.com. Not legal advice.*