Not all investigations like this are funded by drug companies. For example, and as a perfectly balanced counterpoint to the one you are trying to make about iv

Not all investigations like this are funded by drug companies. For example, and as a perfectly balanced counterpoint to the one you are trying to make about ivermectin, dexamethasone was rapidly identified as a cheap, easily available, out of patent medication that significantly reduces morbidity and mortality in covid hospitalised patients early in the pandemic by NHS doctors