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- Peer Tfelt-Hansen.
- Danish Headache Centre, Department of Neurology, Glostrup Hospital, University of Copenhagen, Glostrup, Denmark. ptha@glo.regionh.dk
- J Headache Pain. 2009 Oct 1; 10 (5): 311315311-5.
AbstractRecurrence was first recognised as a clinical problem in 1989 with the advent of sumatriptan. The history of recurrence in early sumatriptan randomised clinical trials is described. Recurrence has been ascribed to patient-dependent factors but experience with ergot alkaloids suggested that recurrence can also be treatment-dependent. Possible mechanisms for recurrence are discussed.
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