My Wife Has Been Suffering From Fever Since Last Four

My wife has been suffering from fever since last four days. I have taken her to a doctor for examination.. He told that it is a viral infection and advised clavox 625 three times a day levoc m tab 2 times a day n zerotuss syrup three times a day.. She took it regularly since last 3 days.. But fever is still repeating n she complain for very weekness. Pl.. Advise me urgently