have vague pan in left chaste and hand. lasts long - hours together. no fixed pattern of onset or remission or duration. nature of pain varies. it tires me and becomes debilitating at times. sometimes more places - neck, middle or right chase , pelvis are etc also painful. was asked to take serta 25. i also was diagnosed of Prinzmetal angina/ unstable angina / ischemia / fibromyalgia. what actually is the thing and what risk pl mukhopadhyay