Which Inhaler Is Better For My Son S Persistent Cough, And How Can He Get Relief?

My son is having cough since dec 2022 he was on nebulisation respule livolin and budecort for 15 days aftr that he was on seraflow and livolin 7days back and I consult another doctor who changed the medicine from seroflow to budecort. Last night his condition worsened and his cough started at 11pm and went till 3 PM without stopping. Even he is given azithral 200 since 7 days. Wanted to. Know which inhaler is better and how he can get relief. It s become nightmare at home.. Kindly suggest.