Triptan
The drugs of this class act as agonists for serotonin 5-HT1B and 5-HT1D receptors at blood vessels and nerve endings in the brain . 
<triplet> serotonin <subj> 5-HT1B <obj> physically interacts with <triplet> 5-HT1B <subj> serotonin <obj> physically interacts with