Friday, Jul 24, 2026 The claims desk. Receipts included. POWERED BY LENZ
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HEALTH

The Claim

The human enzyme CYP2C19 metabolizes about 10% of commonly prescribed medications, including some antidepressants, proton pump inhibitors, clopidogrel, and voriconazole.

The Short Version

Reliable medical references support the statement that CYP2C19 is involved in metabolizing about 10% of commonly prescribed drugs. The cited examples—some antidepressants, proton pump inhibitors, clopidogrel, and voriconazole—are all well-established CYP2C19-related medications. The exact percentage can vary by source and definition, but that caveat does not change the main takeaway.

Caveats

  • The "about 10%" figure is approximate; some sources use different denominators and report lower estimates.
  • Not every drug in the listed classes depends on CYP2C19 to the same extent; the claim is about representative examples, not all members equally.
  • CYP2C19's clinical relevance often reflects both metabolism and genetic variation, so drug response can vary substantially by patient genotype.

The Receipts

  1. CYP2C19 gene

    MedlinePlus Genetics (NIH)

  2. Cytochrome P450 2C19 (CYP2C19) Genetic Testing

    NCBI Bookshelf (StatPearls)

  3. Clinical Pharmacogenetics Implementation Consortium Guideline for CYP2C19 and Voriconazole Therapy

    Clinical Pharmacogenetics Implementation Consortium (CPIC)

  4. Clopidogrel Therapy and CYP2C19 Genotype

    NCBI Bookshelf (Medical Genetics Summaries)

  5. CYP2C19 – an overview (Medicine and Dentistry)

    ScienceDirect Topics (Elsevier)

  6. Voriconazole Therapy and CYP2C19 Genotype

    NCBI Bookshelf (Medical Genetics Summaries)

  7. From genes to drugs: CYP2C19 and pharmacogenetics in clinical practice

    Frontiers in Pharmacology (via PubMed Central)

  8. Clinical and genetic determinants of proton pump inhibitor pharmacokinetics and pharmacodynamics

    PubMed

  9. Pharmacogenetics of steady-state metabolism, pharmacokinetics, and safety of voriconazole in healthy adult volunteers

    PubMed

  10. Impact of the CYP2C19 Genotype on Voriconazole Exposure in Adults with Invasive Fungal Infections

    Clinical Pharmacology & Therapeutics (PMC)

+ 19 more sources — see the full list on Lenz

Filed Under

ClopidogrelCYP2C19Voriconazole

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