Abstract
We investigated the association between serotonergic polymorphisms and incidence of nausea, which is the most frequent side-effect of selective serotonin reuptake inhibiters (SSRIs), in 66 patients treated with fluvoxamine in a protocolized-dosing method. We focused on three polymorphisms of serotonin (5-HT) neuronal systems such as 5-HT transporter (5-HTT) gene-linked polymorphic region (5-HTTLPR), a variable number of tandem repeat (VNTR) polymorphism in the second intron of the 5-HTT gene (STin2) and tryptophan hydroxylase (TPH) gene polymorphism in intron 7 (TPH-A218C), which have been reported to possess positive association with treatment response to SSRIs. In addition to this, the relationship between development of nausea and treatment response was also analyzed. Results suggested that these three polymorphisms did not affect the development of fluvoxamine-induced nausea, and that incidence of nausea was not a phenomenon that predicts the treatment response to fluvoxamine.
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