 This study will be conducted as a retrospective study of exposed and unexposed cohort of the French population included all beneficiaries aged 65 and older. Exposed patients will be matched to non exposed controls according age, gender and area of residence ratio 14. Two exposed arms and two non exposed control arms will be planned. Triptan arm will be user of triptan defined as at least one recorded dispensing of any drug during the follow up, with no recorded of any of these drugs during the previous 6 months new or incident users. Ergot arm will be user of ergot derivative defined as at least one recorded dispensing of any drug during the follow up, with no recorded of any of these drugs during the previous 6 months new or incident users. This study involved data from the French National Health Insurance Information System Système National dInformation Inter-Régimes de lAssurance Maladie ; SNIIRAM linked with the French hospital discharge database Programme de Médicalisation des Systèmes dInformations, PMSI. 