That's the hunch these drugs are based upon. But things in biochemistry are rarely black and white. There are people with serious experience in the field saying

That's the hunch these drugs are based upon. But things in biochemistry are rarely black and white. There are people with serious experience in the field saying that there is a risk. Certainly the risk is lower than untreated covid, but it's just that if you can avoid the risk then all the better.