Myths vs facts: Pharmakogenetik Medicheck and Müdigkeit

The claim that a pharmacogenetics test like Medicheck can reliably explain why someone is tired is largely a myth. While genetic variants (e.g., in CYP2D6, CYP2C19, or COMT) influence drug metabolism and neurotransmitter breakdown, fatigue is a multifactorial symptom. Sleep deprivation, stress, diet, lack of exercise, and medical conditions (e.g., hypothyroidism, anemia) are far more common causes. A genetic test can only suggest how someone might process certain medications – it is not a fatigue diagnosis. The evidence for a direct causal link between single SNPs and general fatigue is weak to moderate (mostly GWAS, no clinical validation). Fact: Without accompanying lab work (e.g., ferritin, TSH, vitamin D) and a clinical history, the test's value for fatigue is unclear. Many marketing claims overstate its utility. Safety note: Never adjust medication dosages based solely on a genetic test; always consult a physician.