由细辛、白芍、川芎和徐长卿等中药制成的止痛胶囊，呈剂量依赖性抑制小鼠扭体反应和大鼠嘶叫反应。还能抑制热板痛反应和佐剂性关节炎的急性疼痛和慢性疼痛。提示止痛胶囊对不同性质的疼痛都有镇痛作用。１０００ｍｇ／ｋｇ止痛胶囊的镇痛效力相当于１ｍｇ／ｋｇ吗啡 The analgesic capsules made from Asarum, Angelica, Rhizoma Chuanxiong, and Xu Changqing had a dose-dependent inhibition of writhing responses in mice and howling responses in rats. It can also suppress hot plate pain reaction and acute pain and chronic pain of adjuvant arthritis. Tips Analgesic capsules have analgesic effects on different types of pain. The analgesic efficacy of 1000mg/kg analgesic capsule is equivalent to 1mg/kg morphine