I think the best answer is that it is under study and good science takes time. Initial indications are positive but anecdotal. More data is needed. This is from

I think the best answer is that it is under study and good science takes time. Initial indications are positive but anecdotal. More data is needed. This is from Dr. Fauci yesterday. There is reasonable hope for better treatments from a range of drugs but for each one you need quality studies to determine the effect size, dosage, risk/benefit, and statistical significance. If we can slow this pandemic we will have more time for the science, plus many other preparations that are happening in hospitals. Wash your hands, limit social contact, stay informed.