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Is Drug Addiction Genetic?
- Heritability
- ~60%
- Inheritance
- polygenic
- Key genes
- DRD2 OPRM1 GABRA2
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Substance use disorders have heritability of 40–70% depending on the substance. Genes in dopamine and opioid pathways are implicated.
How Genetic Is Drug Addiction?
Drug Addiction involves complex interactions between multiple genes and environmental factors. Heritability estimates range up to 60%, though no single gene determines outcome on its own.
Key genes associated with Drug Addiction: DRD2 OPRM1 GABRA2. Variants in these genes have been identified through genome-wide association studies (GWAS) and clinical research as influencing susceptibility or severity.
Source: NIH
Does Family History Matter for Drug Addiction?
Family history can be informative for Drug Addiction, but its predictive power is limited because many genes — each with small effects — combine with environmental influences. A family history of the condition may prompt earlier or more frequent screening.
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