Table II. List of studies of the Taq1A polymorphism (rs1800497) from the ANKK1/DRD2 locus in association with antipsychotic drug-related prolactin levels.
| Reference | Drug | N patients | Allele | Significant? |
| Calarge et al 200977 | Risperidone | 107 | A1 (T) | Yes |
| Kwon et al 200878 | Aripiprazole | 90 | No | |
| Yasui-Furukori et al 200879 | Risperidone | 174 | No | |
| Aklillu et al 200780 | Perphenazine | 22 | A1(T) | Yes |
| Anderson et al 200781 | Rispendone | 101 | No | |
| Young et al 200482 | Various | 144 | A1(T) | Yes |
| Mihara et ai 200083 | Nemonapride | 25 | A1(T) | Females only |