What is Pharmacogenomics?

The science of how your genes affect your response to medications — and how Drugly.AI puts 25+ years of research at your fingertips.

๐Ÿ’ก The big idea

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Two people take the exact same dose of codeine for the exact same headache. One feels relief in 30 minutes. The other feels nothing. A third has dangerously slow breathing within an hour.

Why? Their genes are different. Specifically, the gene CYP2D6 that converts codeine into morphine in the body. Some people have variants that make this gene hyperactive (rapid metabolizers). Others have variants that make it inactive (poor metabolizers).

Pharmacogenomics is the science that turns this insight into actionable medicine.

๐Ÿ“Š Three things to know

~99% of people

have at least one variant that affects how they respond to a common medication.

30-50% of adverse reactions

are estimated to be preventable with pharmacogenomic testing.

200+ FDA-labeled drugs

have pharmacogenomic information on their official labels (and that number keeps growing).

๐Ÿงญ The five things you can search

Drugly.AI organizes pharmacogenomic data into five interlinked entity types. From any one, you can navigate to the others.

Drugs

Medications with known pharmacogenomic considerations. You'll see CPIC dosing recommendations, FDA/EMA label info, clinical evidence, and which genes affect each drug.

Try: warfarin, clopidogrel, codeine

Genes

Human genes whose variations affect drug response. VIP (Very Important Pharmacogene) genes have the strongest evidence. Each gene page shows all drugs it affects.

Try: CYP2C9, CYP2D6, VKORC1

Variants

Specific genetic differences (SNPs, haplotypes, star alleles). Each variant page lists studies that found drug-response effects, with PubMed links.

Try: rs1799853, rs4244285, *1/*3

Conditions

Diseases, side effects, and outcomes that pharmacogenomics affects: drug efficacy, toxicity, hypersensitivity reactions. Linked to drugs and genes.

Try: myopathy, Stevens-Johnson, bleeding

Pathways

Visual diagrams from PharmGKB showing how drugs move through and act on the body, gene by gene, step by step.

Try: Browse all pathways

๐ŸŽฏ Three ways to use it

Whatever you start with — a drug, a gene, a variant — you'll find what you need.

A

"I want to know about a specific drug"

Search for the drug. You'll see all PGx-relevant genes for it, dose recommendations from CPIC, regulatory label info from FDA / EMA / others, and the strongest clinical evidence.

Try with warfarin
B

"I want to know about a specific gene"

Search for the gene symbol. You'll see all drugs it affects, the variants in that gene with the most evidence, and clinically actionable summary annotations.

Try with CYP2D6
C

"I want to research a specific variant or rsID"

Search by rsID. You'll see the PMID-linked studies that found drug-response effects, the drugs affected, and any clinical haplotype pairings.

Try with rs1799853

๐Ÿ‘ฅ Who uses this and how

Pharmacists

  • Patient counseling: Explain why a patient might respond differently to their new prescription.
  • Drug selection: When two drugs are options, check which has clearer PGx guidance for the patient's genotype.
  • Dose adjustment: Verify CPIC-recommended dose modifications for known metabolizer phenotypes.
  • Adverse event review: Investigate unexpected side effects — is there a genetic explanation?
  • Continuing education: Stay current with FDA biomarker label additions across major drug classes.

Researchers & students

  • Literature review: Find PMID-anchored variant annotation studies for a hypothesis-generating gene.
  • Cross-population studies: Use specialty-population tags on summary annotations to find relevant cohorts.
  • Pathway exploration: See visual diagrams of how a drug moves through the body, gene by gene.
  • Teaching: Show pharmacogenomic concepts with real examples and beautiful interactive diagrams.
  • Grant preparation: Quickly survey the evidence landscape for a drug-gene pair you're proposing to study.

โš ๏ธ Important to know

Educational reference, not clinical advice

  • Drugly.AI's pharmacogenomic module is a knowledge reference tool designed for healthcare professionals and students. It is not a clinical decision support system and does not replace professional judgment.
  • Always consult licensed healthcare providers — pharmacists, physicians, clinical pharmacologists — for any medication decisions.
  • Data is sourced from PharmGKB / ClinPGx 2025, the gold standard for pharmacogenomic research. Updates are released periodically; check the dashboard for the current ingestion date.
  • Evidence levels (LOE 1A through 4) reflect the strength of supporting research, not the certainty of an individual response. Even Level 1A guidelines describe population trends.
  • Pharmacogenomic testing in clinical practice requires certified laboratory testing and proper interpretation by qualified clinicians.

๐Ÿš€ Ready to explore?

Start with a single search — a drug name, a gene symbol, a variant rsID — and let the connections guide you.

Open PGx Search