NCIt definition : The succinate salt form of sumatriptan, a member of the triptan class of compounds
with anti-migraine property. Sumatriptan succinate selectively binds to and activates
serotonin 5-HT1 receptors. This results in constriction of meningeal, dural, cerebral
or pial blood vessels via stimulation of the 5-HT1B receptors, thereby reducing the
vascular pulsation and may provide relief in migraine headaches. Furthermore, agonistic
action of this agent through presynaptic stimulation of 5-HT1D and/or 5-HT1F receptors
prevents release of vasoactive and pro-inflammatory neuropeptide (calcitonin gene-related
peptide), thereby may also relieve migraine headaches. In addition, central inhibition
of pain transmission via the inhibition of trigeminal neurons in the brain stems and
upper spinal cord mediated by 5-HT1B, 5-HT1D or 5-HT 1F receptors also aides in the
alleviation of migraine pain.;