PRL and hyperprolactinemia: According to some pharmacological activities of chamomile such as interaction with neurotransmitter and neural system (28, 29) and its antioxidant (21), anticancer (24) and anti-inflammatory effects (23), along with some of its medical and traditional uses, we decided to investigate the efficacy of chamomile syrup in reducing prolactin levels and compare it with that of cabergoline by conducting a 4-week, pilot, randomized, controlled clinical trial in women with idiopathic hyperprolactinemia.