Risk Factors for Extrapyramidal Symptoms During Treatment With Selective Serotonin Reuptake Inhibitors, Including Cytochrome P-450 Enzyme, and Serotonin and Dopamine Transporter and Receptor Polymorphisms

Abstract

The risk of EPS with SSRIs seems to increase with advanced age and with the presence of the A1 allele of DRD2 Taq1A polymorphism. Because of the small sample size of our study and the use of historical controls rather than patients who did not experience EPS during SSRIs treatment, the DRD2 finding is preliminary and needs to be replicated in other studies before firm conclusions can be drawn. At least 1 additional potential risk factor was found in almost all cases.