Herb of the Californian poppy, phytotherapeutically processed by the EMA, negatively monographed by Commission E due to a lack of proven effect at the time, assessed as traditional use by the HMPC of the European Medicines Agency in 2015. The flowering parts are used homeopathically(Commission D).
HMPC monograph: Traditional-use: mild symptoms of mental stress, to support sleep.
CommissionE: Negative monograph, no provable data at the time
CommissionD: Positive monograph for the freshly flowering plant: sleep disorders and restlessness