DRD4 variants have been reported to be associated with alcohol, opioid, and nicotine dependence, as well as pathological gambling. These associations do not establish that DRD4 variants cause these outcomes.

University of Minnesota

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Psychiatric disorders are complex conditions involving interactions between genetic and environmental factors. Variants of the dopamine receptor D4 (DRD4) gene contribute to an increased susceptibility to these disorders rather than causing them outright.

DRD4 Variants as a Risk Factor for Psychiatric Disorders

DRD4 Variant Associations with Substance Dependence and Pathological Gambling

DRD4 variants have been investigated for an association with autism, but their contribution remains unclear, and the reported relationship does not establish causation.

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