Serotonin Transporter Genotype and Acute Subjective Response to Amphetamine

Abstract
The authors have previously shown an effect of dopamine transporter genotype on acute subjective responses to d‐amphetamine, which may affect risk of addiction. They now report the results of an evaluation of the role of the serotonin transporter gene (HTT) using a double‐blind, placebo‐controlled, crossover design in which subjects (N = 101) completed self‐report measures of subjective effect. The separate and combined analyses of the gene‐linked polymorphic region (5‐HTTLPR) and the Intron 2 VNTR suggest that these two HTT polymorphisms may contribute to acute subjective responses to d‐amphetamine with a small effect.