I have looked at the trials. I wasn't impressed.
The ones I've seen aren't nearly comprehensive enough.
As for the danger, I think perhaps either you've misunderstood me or I've done a bad job explaining it.
Yes, administering it to someone, with their consent, when there are no realistic other options and survival prospects are already low, can probably be justified.
What's not justified here, is using it as a first line treatment. In individual cases it may be justified in the context of the situation, but not for widespread use. Because if it turns out to be useless, and we know it has side effects, and we know other people really do need it, the danger of doing more harm than good becomes unacceptably high.
The problem is trumps comments have caused it to be used to a degree that is not justified by the existing data.
And if we just did that all the time, if we (as a society) just start treating people with any given drug that shows promise in studies of a few dozen people or no controls. What will happen is all sorts of drugs will get used inappropriately, and that will wind up killing people.
That is my problem with this.
Once there are proper studies, on people, with controls and sample sizes larger than a couple dozen, then it will be justified.