Kind of sums up my reply. Generally, if you know or there is enough suspicion the cure is going to harm or kill one and euthanasia is out of the picture then you are liable. That's why the whole process exists about medical trials. One nice window here is that you can in general experiment on yourself (people have and are doing that). Depends on the framework, but good point.

Anyways, my point here is you can not override law (or you shouldn't be able to).