foeniculum vulgare (fennel) has been widely used in traditional medicine for treatment of variousdiseases including pediatric colic. this study was designed to assess the antinociceptive effects of aqueousextract of f. vulgare on visceral pain and possible involvement of opioidergic, serotonergic, adrenergic andhistaminergic systems. the results of this study showed that aqueous extract of f. v...