Sir my father is 66 years old. For last 3 days, he is reeling under severe fever ranging between 102- 104 F temp. He is being administered Dolo 650 tab almost after every 5-6 hours. After giving tab within 2 hrs. His temp becomes normal. He is feeling very weak, not at all interested in having food, feeling very cold when fevers creeps up, body ache. He has no cold. Once or twice he had vomiting after having food. He also took gudcef 200mg for 3 days but now has been discontinued. Kindly suggest what to do.