Pretreatment With Sumatriptan on Cilostazol Induced Headache in Healthy Volunteers

There remains a great need for more effective anti-migraine drugs with fewer side effects. Human experimental models are valuable in early phase development of new anti-migraine drugs but useful models have not yet been developed. The investigators' group has shown that Cilostazol, a phosphodiesterase inhibitor induce headache/migraine in both healthy volunteers and in patients with migraine without aura (MO). To validate cilostazol as a model, the headache must respond to specific migraine treatment with sumatriptan. Hypothesis: Cilostazol induces a migraine-like headache in healthy subjects. The induced headache can be pre-treated with a specific anti-migraine drug; sumatriptan. Aim: Developing a pragmatic and valid model for the testing of new anti-migraine drugs.