Breathlessness after takin budecort.

Patient is covid positive, and takin budecort through nebulization among other medicines. Oxygen level is around 98-97, ct severity score is 11/25 on 28th april. Crp was 29.55 on 26th April, and 21.5 on 30th april. Today is 13th day of symptoms. After taking budecort 0.5 mg nebulization, breathlessness is felt by patient each time, which lasts for around 30 minutes and oxygen also drops to 95 which recovers after 30 minutes. Other medicines which are used: montair lc (once a day), medrol 16 mg(twice a day), zocef cv(twice a day), pulmoclear (twice a day), dolo 650 (thrice a day), zincovit (once a day), vitamin c(once a day), anticoagulant injection (once a day). Ivermectin, doxycycline, fabiflu course completed. So, why the breathlessness is felt after budecort nebulization, what are remedies?