Cayenne or Capsicum spp (Capsicum frutescens and Capsicum annum) is a very useful stimulant, regulating blood flow and helpful to the cardiovascular system. Cayenne may reduce blood cholesterol and triglyceride levels and platelet aggregation.
Cayenne has traditionally "been used for colic, flatulent dyspepsia, laryngitis (as a gargle), insufficiency of peripheral circulation, and externally for neuralgia including rheumatic pains and unbroken chilblains (as a lotion/ointment)" neuralgia and rheumatic pains. When taken with meals, cayenne stimulates secretion of digestive juices thus aiding digestion.
In herbal combinations, cayenne works as a catalyst increasing the effectiveness of other herbs.