Study	Reason for exclusion
Amelin 2000	Not controlled, only intra‐group comparison reported
Andersson 1981	SSRI femoxetine no longer produced by drug company
Bittman 1992	Not randomised
Bussone 1991	Data presented aggregate patients with migraine and chronic tension‐type headache
Centonze 2000	Both groups took venlafaxine
Colucci d'Amato 1998	Not randomised
Colucci d'Amato 1999b	Not randomised
Colucci d'Amato 2000	Not randomised
Diamond 1989	Not randomised
Foster 1994	Not randomised
Iannacchero 1999	Not randomised
Kangasniemi 1983	SSRI femoxetine no longer produced by drug company
Kathpal 1998	Not randomised
Orholm 1986	SSRI femoxetine no longer produced by drug company
Rampello 2004	Patients with comorbidity of depression, migraine, tension‐type headache
Sandrini 1991	Not randomised
Saper 1994	Data presented aggregate patients with migraine and with chronic daily headache
Zeeberg 1981	SSRI femoxetine no longer produced by drug company

SSRI: selective serotonin reuptake inhibitor