Covid fever not getting down. His fever!

My husband is Having all symptoms of covid from 23 April. Firstly UTI, then cough and fever. Lost taste and smell also. We done CT scan on 27 april and score is 9. His fever is not going down. Yesterday he has 103.8 fever. Oxygen level is 96/97 He is overweight, diabetic. Giving these medicines- 1)Tab Azithromycin 500mg 1-0-0 for 5 days (After Food) 2)Tab Doxycycline  100 1-0-1 for 5 days (After food) 3)Tab Ivermectin (12) 1-0-0 for 5 days(After Food) 4)Tab Paracetamol 650 mg 1-1-1 for 3 day(After Food) 5)Tab Montair LC 0-0-1for 5day(After Food) 6)Tab Pan40mg 1-0-0 (Before breakfast) 7)Tab zinc 1-0-1 8)Tab Vit C 500 mg 0-1-0 9)Steam inhalation with capsule karvol plus 3 times a day. 10) Tab Zukanorm m 500/50 2 times a day Please suggest for his fever