Medication Metabolism
The enzyme family that processes roughly half of all prescription drugs. Your version determines whether standard doses work perfectly, cause side effects, or barely register. This prevents the trial-and-error prescribing that leaves people cycling through medications, wondering why nothing works right.
What this measures
How your DNA shapes medication metabolism.
The CYP450 enzyme family — particularly CYP2C19, CYP2D6, CYP2C9, and CYP3A4 — handles the clearance of roughly half of all commonly prescribed medications. Each enzyme has its own variant set and its own phenotypic spectrum from "poor" to "ultrarapid" metabolizer. The combination across enzymes shapes an individual's overall pharmacogenomic profile.
Carriers of CYP2C19 reduced-activity variants are associated with poor activation of clopidogrel (Plavix) and longer exposure to PPIs and certain antidepressants. CYP2D6 phenotype shifts response to opioids, beta-blockers, and many psychiatric medications. CYP2C9 variants shape warfarin dosing alongside VKORC1. Each variant is consequential; the combination is more so.
Drug-drug interactions through these enzymes are extensive and often unpredictable without knowing the genotype. Grapefruit juice, St. John's wort, smoking, and many over-the-counter supplements all shift CYP activity. Liver function, age, and acute illness produce further variability.
The "this medication didn't work for me" or "I had a strong reaction at a low dose" pattern often tracks to a CYP variant the prescriber didn't have visibility into. Which combination you carry is information worth providing to clinicians — particularly before starting any psychiatric medication, anticoagulant, or anti-platelet drug.
Medication Metabolism is one specific finding in this system. Your Genomic Lifestyle Optimization Report shows where your variants place you on the detoxification pathways spectrum — and what you can do about it.
In your report
Where Medication Metabolism lives inside your Genomic Lifestyle Optimization Report.
Medication Metabolism renders as a dark-background card with a color marker calibrated to your specific variants. The card opens with the gene mechanism, shows your result at a glance via that marker, and closes with a practical, mechanism-led recommendation — what to eat, what to time, what cofactors to support.
Want to see what a real Mosaic dark card looks like? Walk through a sample report →
In context
Breakdown of Medications: the 4-insight cluster.
Medication Metabolism is one finding in a tightly-related cluster. Mosaic sequences the other 3 alongside it so you see the whole biology — not an isolated data point.
- Acetaminophen MetabolismYour liver clears Tylenol at its own pace—fast, intermediate, or slow. If you're a slow processor, standard doses linger longer than they should, and "take two every four hours" might be too much for your system. This guides safe dosing and prevents accidental overload.
- Anesthetics MetabolismSome people wake up from anesthesia quickly and clearly; others are groggy for hours or experience prolonged side effects. Your clearance rate predicts which camp you're in—valuable information before any procedure requiring sedation.
- NSAIDS MetabolismIbuprofen, aspirin, and naproxen—your clearance rate for these common pain relievers varies. Slow metabolizers face higher GI bleeding and cardiovascular risk at doses that are perfectly safe for fast metabolizers. This is the kind of information that should come before chronic use, not after complications.
Questions people ask
About Medication Metabolism.
- How does my DNA influence medication metabolism?
- Phase I (CYP450 enzymes), Phase II (sulfation, glucuronidation, methylation), and Phase III (transport) — the three-act process by which your body neutralizes everything from caffeine to alcohol to environmental compounds. Genetic variants in any phase shift the kinetics, and the bottleneck moves accordingly.
- What kind of test do I need to see my Medication Metabolism result?
- Whole-genome sequencing at 30× clinical depth. Consumer SNP-chip tests like 23andMe or AncestryDNA only read ~0.02% of your DNA and miss most of the variants this analysis needs. Mosaic reads all 3 billion base pairs and produces the full 108-insight report.
- How is Medication Metabolism different from clinical lab testing?
- Clinical labs measure downstream biomarkers — blood levels, hormone values, metabolic byproducts — at a single point in time. Genomic insights like Medication Metabolism reveal the underlying variant that shapes the biology, which is constant for life. The two are complementary: labs show the current snapshot; genomics shows the long-term tendency and where lifestyle leverage is highest.
More from Detoxification Pathways
detoxification pathways
Acetaminophen Metabolism
Your liver clears Tylenol at its own pace—fast, intermediate, or slow. If you're a slow processor, standard doses linger longer than they should, and "take two every four hours" might be too much for your system. This guides safe dosing and prevents accidental overload.
Read insight →detoxification pathways
Acetylation
This pathway handles histamine, caffeine, and a long list of chemicals and medications. Slow acetylators often experience fragrance sensitivity, medication side effects, or react to things that most people tolerate. Once you know, you can support the bottleneck instead of wondering why everything bothers you.
Read insight →detoxification pathways
Anesthetics Metabolism
Some people wake up from anesthesia quickly and clearly; others are groggy for hours or experience prolonged side effects. Your clearance rate predicts which camp you're in—valuable information before any procedure requiring sedation.
Read insight →detoxification pathways
Glutathione Support Needs
Glutathione is your body's master antioxidant—the one that recycles all the others. Some people produce plenty; others run chronically low without knowing it. Lower genetic output is common and responds well to precursors like NAC, glycine, and selenium. This is often the missing piece for people who "do everything right" but still feel run down.
Read insight →detoxification pathways
MTHFR Activity
MTHFR converts synthetic folic acid into the active methylfolate your body uses. Reduced function is common, affecting up to 40% of people. If you're one of them, standard prenatal vitamins and fortified foods won't cut it. Methylfolate supplementation bypasses the bottleneck entirely.
Read insight →detoxification pathways
Methylation
Methylation is the behind-the-scenes regulator of detox, neurotransmitter production, and gene expression. Suboptimal activity is surprisingly common—and highly responsive to the right form of B-vitamins. If you've ever taken B-complex and felt nothing (or worse), this is probably why.
Read insight →
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