Rubr, well we first need to get injected a COVID patient and then monitor. It does not take long for a critical patient to go down hill quickly, by the time they are admitted, I have read two - three weeks they died and that is using HIV related products. Here is drugs given to a patient who lasted two weeks:

He was given interferon alfa-2b (5 million units twice daily, atomisation inhalation) and lopinavir plus ritonavir (500 mg twice daily, orally) as antiviral therapy, and moxifloxacin (0·4 g once daily, intravenously) to prevent secondary infection.