满山红为杜鹃花科植物兴安杜鹃的干燥叶。夏、秋二季采收,阴干。其味辛、苦,性寒。归肺、脾经。功能止咳祛痰。用于治疗咳嗽、气喘、痰多。药材叶多反卷成筒状,有的皱缩破碎,完整叶片展平后呈椭圆形或长倒卵形,长2至7.5cm,宽1至3cm。先端钝,基部近圆形或宽楔形,全缘;上表面暗绿色至褐绿色,散生浅黄色腺鳞;下表面灰绿色,腺鳞甚多;叶柄长3至10mm。近革质。气芳香特异,味较苦、微辛。主产黑龙江、内蒙古、吉林、辽宁等地。药理研究满山红有止咳、祛痰,平喘、抗炎、抑菌等作用。副作用主要表现为胃肠道反应,如口干、恶心、呕吐、胃部 Manchurian rhododendron Rhododendron Rhododendron dry leaves. Harvest summer and autumn, dry. Its spicy, bitter, cold. To the lungs, spleen. Function cough expectorant. For the treatment of cough, asthma, sputum and more. The leaves of the medicinal material are mostly rewound into a tube shape, and some are crushed and crushed. The whole leaf is oval or long obovate after flattening, with a length of 2 to 7.5 cm and a width of 1 to 3 cm. Apex obtuse, basally nearly circular or broadly cuneate, entire; upper surface dark green to brownish green, scattered yellowish glandular scales; lower surface grayish green, glandular scales many; petiole length 3 to 10mm. Nearly leathery. Odor aromatic, taste bitter, micro-Xin. Main production Heilongjiang, Inner Mongolia, Jilin, Liaoning and other places. Pharmacology Manshanhong cough, expectorant, anti-asthma, anti-inflammatory, antibacterial and so on. Side effects mainly manifested as gastrointestinal reactions, such as dry mouth, nausea, vomiting, stomach