Talk to Pulmonologist / Lung on Reactive Airway Disease

My daughter, who is 2 years old, experienced breathing difficulties yesterday. I took her to the nearest hospital's emergency department, where her oxygen saturation level was found to be 72. The doctor recommended that we transfer her to another hospital with an ambulance equipped with an oxygen cylinder. Fortunately, we found an ambulance and shifted her to Omi Hospital, where the staff was helpful and attentive. Surprisingly, her oxygen saturation level improved to 92 without the use of the oxygen cylinder. The doctor diagnosed her with Reactive Airway Disease and suggested administering a Titan 1000mg injection (diluted to 750mg). I have been following the doctor's instructions, but now my daughter is restless, unable to sleep, and irritable. I am concerned and would appreciate any guidance or advice.