RT Journal A1 Knudsen JF, Friedman B, Chen M, Goldwasser JE T1 A surfeit of serotonin: Sumatriptan and serotonergic antidepressants JF Archives of Internal Medicine JO Archives of Internal Medicine YR 1999 FD May 24 VO 159 IS 10 SP 1141 OP 1142 DO UL http://dx.doi.org/ AB Schwartz raises an important issue, namely, what is the potential for pharmacodynamic interactions when drugs such as fluoxetine, an SSRI, is coadministered with other drugs known to affect neurotransmission, for example, sumatriptan? Such drugs may alter serotonin neurotransmission by different mechanisms of action. These include inhibition of serotonin reuptake or metabolism, increased synthesis or release, and direct stimulation of serotonin receptors. Sumatriptan, the first of the class of so-called triptans to be marketed, and the "new triptans" such as naratriptan, zolmitriptan, and rizatriptan are included in the last category.