That's a very powerful point. Every treatment (nay everything) is a one-way door: You do something, and there's no going back. With general medicine you can at

That's a very powerful point. Every treatment (nay everything) is a one-way door: You do something, and there's no going back. With general medicine you can at least infer some knowledge based on other people's reaction to the same drug. But in "N-of-1" drugs, you're left completely in the dark. It's (going to be) a very hard call to make.