In last week my wife aged 48 years , wt 64 kg suffered from cold flu and fever with body pain and Local MD Doctor prescribed 5 days course with antibiotics and other medicines after some blood reports which were all normal and Dr diagnosed it as Flu . Now after completion of course 2 days back my wife is having dry coughing issue . She is not able to have proper sleep in night and also coughing during day . She is now prescribed Levoce M 0-0-1 and C-KOF tablet 1-0-1 with nebulizer with derindine0.5 mg but dry coughing is still there . Please advise as my wife have no other medical conditions or any existing medical issues.