Believe it or not, I heard this discussion on NPR this morning. Some international outfit (not our FDA) was questioning the use of experimental untested drugs in Ebola cases. Wow.
A patient has a disease with a 90% death rate. Nothing anyone can do can make the patient's chances worse than that. It's always ethical to do anything short of euthanasia to try and cure a patient who is that gravely ill. It is indeed possible that experimental untested treatments have side effects and risks. But compared with the 90% chance of dying of Ebola, nobody cares about side effects or risks of experimental treatments. Certainly not the patients.