Over 2 months of treatment , SSRIs are no more efficacious than placebo in patients with migraine .
In patients with chronic TTH , SSRIs are less efficacious than tricyclic antidepressants .
In comparison with SSRIs , the burden of adverse events in patients receiving tricyclics was greater .
BACKGROUND Headache is a common medical problem .
In view of recent discoveries about the role of serotonin in pain mechanisms , selective serotonin re-uptake inhibitors ( SSRIs ) have been evaluated for the prevention of  migraine and tension-type headaches ( TTH ) .
OBJECTIVES To evaluate the efficacy and tolerability of SSRIs for preventing migraine and TTH .
A non-selective (amitriptyline), but not a selective (citalopram), serotonin reuptake inhibitor is effective in the prophylactic treatment of chronic tension-type headache.
OBJECTIVES : Although the tricyclic antidepressant amitriptyline is extensively used in the prophylactic treatment of chronic tension-type headache , only few studies have investigated the efficacy of this treatment and the results are contradictory . In addition , the new selective serotonin reuptake inhibiting antidepressants , which are widely used in depression and of potential value in pain management , have never been investigated in a placebo controlled study of tension-type headache . The aim was to evaluate the efficacy of amitriptyline and of the selective serotonin reuptake inhibitor citalopram in chronic tension-type headache . METHODS : Forty non-depressed patients with chronic tension type headache were included in a 32 week , double blind , placebo controlled , three-way crossover study . RESULTS : Thirty four patients completed the trial .  Amitriptyline reduced area under the headache curve by 30 % compared with placebo ( P = 0.002 ) , whereas citalopram had no significant effect ( P = 0.68 ) . Explanatory analyses showed that amitriptyline significantly reduced the duration of headache ( P = 0.01 ) , headache frequency ( P = 0.01 ) , and intake of analgesics ( P = 0.02 ) but not headache intensity ( P = 0.12 ) . CONCLUSION : Although amitriptyline did not eliminate the headache , it provided a clinical ly important reduction of headache in the majority of otherwise treatment resistant patients . The differential effect of amitriptyline and citalopram indicates that mechanisms other than inhibition of serotonin reuptake are involved in the analgesic effect of the tricyclic antidepressants . Amitriptyline , but not citalopram , is valuable in the prophylactic treatment of chronic tension type headache
Over 2 months of treatment , SSRIs are no more efficacious than placebo in patients with migraine .
In patients with chronic TTH , SSRIs are less efficacious than tricyclic antidepressants .
In comparison with SSRIs , the burden of adverse events in patients receiving tricyclics was greater .
BACKGROUND Headache is a common medical problem .
In view of recent discoveries about the role of serotonin in pain mechanisms , selective serotonin re-uptake inhibitors ( SSRIs ) have been evaluated for the prevention of  migraine and tension-type headaches ( TTH ) .
OBJECTIVES To evaluate the efficacy and tolerability of SSRIs for preventing migraine and TTH .