Effects of Valeriana officinalis (Valerian) on tension-type headache: A randomized, placebo-controlled, double-blind clinical trial.

Tension-type headache is the most frequent type of headache. Considering the effectiveness of Valeriana officinalis (Valerian) in treatment of some types of headache, the effect of valerian root was studied in patients with tension-type headache.The current study is a double-blind randomized clinical trial that was conducted in Shams Hospital of Mashhad University of Medical Sciences, Mashhad, Iran, from January to June 2018. We included 88...