Sumatriptan tablets are used to treat migraine headaches. They contain the active ingredient Sumatriptan which belongs to a group of medicines known as selective serotonin 5-HT1B/1D  agonists or \"triptans\" Triptans are very effective in stopping a migraine from reaching its full intensity. When used at the onset of a migraine, Sumatriptan can effectively stop a migraine from developing and thus prevent and disruption to the patients life beyond that point. Usually a single dose will stop a migraine from developing further.