This group of funds are different in chemical structure and mechanism of action of drugs. The main place among the painkillers take analgesics (pain relievers). In addition to analgesic action, non-narcotic analgesics cause antipyretic effect, and many of them possess, in addition, anti-inflammatory properties. Analgesic effect may have also various medications that do not belong to a group of analgesics. Thus, pain associated with spasm of smooth muscles of internal organs, reduced under the influence of antispasmodic, relaxes smooth muscle, with pain occurring as a result of vascular spasm, accompanied by circulatory disturbance of individual organs, are effective vasodilators, in particular, the pain of angina attenuated preparations improves blood circulation in the heart (nitroglycerin), headaches associated with increased blood pressure - antihypertensives, with abdominal pain caused by an accumulation of gas in the intestines, the so-called effective carminative, promotes the release of gases from the intestines. The action of these funds is directed at eliminating the causes of pain.