Your genes affect how you respond
to medications. Know before you take.
Drug dosing has always been based on averages. But you aren't average. Your inherited DNA variants change how fast you metabolize medications — turning a standard dose into an overdose, an underdose, or no effect at all. Kyronix surfaces your pharmacogenomic profile so you can have better, safer conversations with your prescriber.
Download Free on iOSSix drug classes where your genetics matter most
These pharmacogenomic variants are supported by the highest levels of clinical evidence — many are incorporated into FDA drug labels and prescribing guidelines.
Antidepressant & Psychiatric Meds
If you've tried multiple antidepressants without finding one that works — or experienced severe side effects — your metabolism genetics may be why. CYP2D6 and CYP2C19 together govern the breakdown of most SSRIs, TCAs, and antipsychotics. Poor metabolizers accumulate drugs to toxic levels; ultra-rapid metabolizers clear them before they can work. This is one of the most actionable pharmacogenomic insights available.
Pain Medication Response
Why do some people get excellent pain relief from standard doses while others feel nothing — or experience oversedation? CYP2D6 governs the metabolism of many opioids and non-opioid pain medications including tramadol and hydrocodone. Your genotype determines whether you're likely to get therapeutic benefit or a problematic response at standard doses.
Blood Thinners (Warfarin)
Warfarin is the world's most-prescribed anticoagulant — and one of the most dangerous to dose incorrectly. VKORC1 variants determine your sensitivity: certain genotypes require doses 3–4x lower than average to hit the same INR target. CYP2C9 affects warfarin clearance speed. Without genotyping, finding the right dose takes weeks of risky monitoring. With it, your starting dose can be personalized from day one.
Statin Sensitivity
Statins are among the most widely prescribed drugs in the world — and muscle pain is their most common reason for discontinuation. SLCO1B1 encodes a liver transporter that clears statins from the bloodstream. The *5 variant impairs this clearance, causing statin accumulation in muscle tissue and dramatically raising myopathy risk. If statins have caused you muscle pain, this variant may explain it.
Codeine & Opioids
Codeine is a prodrug — your body must convert it to morphine to get pain relief. CYP2D6 drives that conversion. Ultra-rapid metabolizers convert it too fast, flooding the body with morphine and risking respiratory depression even at normal doses. Poor metabolizers get no conversion at all — and no pain relief. The FDA now recommends against codeine in known ultra-rapid metabolizers and nursing mothers.
Immunosuppressants
Drugs like tacrolimus and cyclosporine — used after organ transplants and for autoimmune conditions — have extremely narrow therapeutic windows. CYP3A4 and CYP3A5 variants together metabolize roughly 50% of all drugs on the market, including these immunosuppressants. Variants in CYP3A5 especially affect tacrolimus dosing requirements, making genotyping standard of care in many transplant centers.
Why the same dose affects people so differently
Drug dosing has historically been based on population averages — but you are not an average. Pharmacogenomics is the science of how your inherited DNA variants alter the way your body absorbs, distributes, metabolizes, and eliminates drugs. The result: doses that work perfectly for most people can be dangerously wrong for others.
Drug accumulates in the body. Standard doses produce toxic concentrations. Common with CYP2D6 and CYP2C19. Risk: side effects, organ stress, overdose at normal doses.
Standard dosing guidelines were written for this group. Drug reaches and maintains therapeutic levels as expected. The "average" the dose was designed for.
Drug is cleared before it has time to work — or converted to active metabolite too quickly. Standard doses produce no effect, or cause unexpected toxicity from rapid conversion (e.g., codeine → morphine).
Know your pharmacogenomic profile
Upload your AncestryDNA or 23andMe file. Get your medication metabolism report — and bring it to your next prescriber visit.
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