Chronic Fatigue Syndrome (CPS) is an ilinesa with a primary complaint of persistent or relapsing fatigue along with multiple, non-spedfic symptoms. These symptoms can include headaches, recurrent sore throats, muscle and joint pains and cognitive conplaints. The fatigue can come on suddenly or gradually, but must last for at least six months and is not alleviated by rest. The fatigue results in substantial reduction in previous levels of work, school or persona! activities. In 1994 the diagnostic criteria of CFS was established by an international panel for the U.S. Centers for Disease Control. This criteria is based on time and severity of debilitating fatique and related symptoms.