Genetic and metabolic differences explain why some people experience no drug side effects.
the verdict
SUPPORTED
the evidence backs this
confidence 90/100
Extensive scientific literature confirms that genetic polymorphisms in drug-metabolizing enzymes, transporters, and metabolic factors like the gut microbiome are primary drivers of interindividual differences in drug toxicity and side-effect profiles.
Evidence for · 12
The influence of gut microbiota on drug metabolism and toxicity
2015 · cited by 238
Highlights how variations in gut microbiota metabolism contribute to interindividual differences in drug therapy, efficacy, and toxicity.
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More for · 11
Drug–drug–gene interactions and adverse drug reactions
2019 · cited by 133
Shows that individual genetic variation alters drug-drug-gene interactions and adverse drug reactions.
Being precise with anticoagulation to reduce adverse drug reactions: are we there yet?
2024 · cited by 30
Reviews genetic factors contributing to interindividual variability in anticoagulant response and adverse events.
Genetic differences in drug metabolism associated with ocular toxicity.
1982 · cited by 26
Demonstrates that genetic differences in drug-metabolizing enzymes are related to drug-induced toxicities.
Pharmacogenetics and adverse drug reports: Insights from a United Kingdom national pharmacovigilance database
2025 · cited by 17
Notes that genetic variation contributes significantly to variability in medication response and adverse drug reactions.
Deoxynivalenol and its modified forms: key enzymes, inter-individual and interspecies differences in metabolism
2022 · cited by 8
Discusses interindividual differences in the metabolism of toxins and drugs.
Pharmacogenomics as a Tool in Addressing Genetic VariationDependent Adverse Drug Reactions
2024 · cited by 4
Notes that genetic variables and polymorphisms in drug-metabolizing enzymes are predictors of adverse drug reactions.
Clinical Implementation of Pharmacogenomics and Drug–Drug Interaction Screening in a German Academic Teaching Hospital and Outpatient Follow‐Up
2025 · cited by 2
Shows that functional variants in genes affecting drug metabolism help explain variability in drug response and side effects.
Pharmacogenomics and Personalized Medicine:
A Revolution in Drug Therapy
2025 · cited by 2
Explores how genetic makeup influences response to medications, adverse reactions, and metabolism.
Personalized Medicine and Pharmacogenomics: Impact of Genetic variation on Drug Response and Individualized Therapy - A Review
2026 · cited by 2
Examines how genetic polymorphisms and pharmacogenes influence interindividual variability in drug metabolism and toxicity.
Unraveling interindividual differences and functional consequences of gut microbial metabolism of immunosuppressants
2024 · cited by 2
Demonstrates that gut microbiome and metabolic differences play a major role in interpatient variability in drug pharmacokinetics.
ABCG2 Genetic Variability in Drug Exposure and Toxicity: Implications for Clinical Practice
2026 · cited by 1
Indicates that genetic variability in transporters contributes to interindividual differences in drug response and toxicity.