Omnacortil 7ml for 2 days twice daily.

My daughter has been coughing (clear chest) sometimes for over a week.but since 2days back she started coughing after sleeping continuously and could stop after 2-3hrs. Then completely fine through out the day. Then again after dinner she started non stop coughing for over an hour. But slept later and didn't cough. Started again after waking up but by lunch she was fine and didn't cough when slept in noon. Coughing frequency was more during the day now. Today doctor prescribed Omnacortil 7ml - 2days - twice daily, cherricof 4m - 3 days - twice, Rantop 5ml - 2 days - twice. Surprisingly by giving only 1 dose of OMnacortil she is sleeping peacefully and not coughing since then. It's a steroid. Is it safe? I really don't want to compromise on her immunity for cough. I think she is having major reflux issue and not anything related to asthama or breathing. Should I continue giving her omnacortil as prescribed or reduce it to just once per day for 3 days? Please guide. 🙏