Tension-type headache is the most common form of headache. Eighty percent of cases occur before 40 years of age. A wide variety of antidepressants have been used to treat it. Tricyclics are the only antidepressants that have demonstrated their effectiveness in treating chronic tension-type headache, amitriptyline being the drug of choice. Selective serotonin reuptake inhibitors and other families of antidepressants have not shown conclusive results yet. The present study is a review of the scientific evidence available on antidepressants for treatment of this kind of headache.