onbothbloodvesselsandnerveterminals.Selective5-HT1Dreceptoragonistshave,thusfar,failedto demonstrateclinicalefficacyinmigraine.Triptansthatareweak5-HT1Fagonistsarealsoeffectivein migraine;however,only5-HT1Befficacyiscurrentlythoughttobeessentialforantimigraineefficacy. ...