Hard dry cough since 3 week. Always.

Hi doctor, My wife is suffering from dry cough from last 3 week. She ia coughing hard and getting vomit and tear in eyes due to hard cough. Once she start coughing, it goes for 5 6 seconds.she is coughing after every 10 min. She is fine when she is slepping. She had covid last year with corad score 8. Lungs was 15!% impacted.   There is no other symtoms She got this cough when we travelled to bihar 2 week back for marriage funtion and now we are in bangalore. We have tried some syrup but nothing helping. We met specialist and he prescribed series of medicine. We are taking those medciine from tqo days. But i am bot seeing any much improvement in her cough. I am attaching prescription. Please guide... i am worried if she has lungs cmacer kind of issue. She is non smoker always.