采用切断大鼠腹下神经制备尿频模型。金樱子水提物能使该模型大鼠排尿次数减少，排尿间隔时间延长，每次排尿增多。金樱子水提物抑制家兔离体空肠平滑肌的自主收缩，拮抗乙酰胆碱、氯化钡引起的家兔空肠平滑肌、大鼠离作膀胱平滑肌的痉挛性收缩，拮抗去甲肾上腺素引起的家兔离体胸主动脉条收缩反应，对上述3种平滑肌的抑制作用均呈显著性的量效关系。

Jinyingzi is the dry ripe fruit of Rosa leav gata Michx.. It contains mainly tannic acid, malic acid, citric acid, vitamin C and saponins. Its effect on urinary sy stem was studied on mouse Pollakiuria model by severing hypogastric nerve. Results showed that the water extract of R. laevigata can decrease the frequency and prolong the interval of urination and increase the quantity of eacn urination. The said extract can inhibit the automatic contraction of isolated rabbit jejunal smooth muscle and antagonize the spasmodic contraction arouscd by acetylcholine and barium chloride of isolated rabbit jejunal smoothmusele, and isolated vesical smooth muscle of mouse, and antagonize reaction of contractility aroused by noradrenalin on isolated thoracic aorta strips of rabbit. All of the the three inhibitions of smooth muscle contraction showed signicant dose-response curve.