From SNPedia
[
PMID 17509535] risk of the development of substance dependence significantly increased with the number of "G" alleles at
rs6454674 and SNP8;T/T genotypes had significant interaction effects (p = .0003 for comorbid DD and AD, .0002 for DD, and .007 for AD). SNP3 and SNP8 together exerted stronger genetic effects on SD than either did individually. The peak delta values among all the markers were seen for SNP3 and SNP8 (
rs806368)
| ? | (C;C) (C;T) (T;T) |
 |
[PMID 19052543] Interaction between two independent CNR1 variants increases risk for cocaine dependence in European Americans: a replication study in family-based sample and population-based sample