As noted in the original post you replied to we don't really need a control group because we already have a lot of experience with people who didn't get any dru

As noted in the original post you replied to we don't really need a control group because we already have a lot of experience with people who didn't get any drugs. Quoting that post: "all that is needed is a proper categorization". The goal here is to get enough evidence the treatment works or doesn't work. Conducting double blind studies is not the most efficient and fastest way to do that when you already have a lot of preexisting knowledge about both the patients not receiving any drugs and the safety profile of the drug in question. This is again a situation where statisticians should be asked for help as medical professionals very often operate on very simplistic model (double blind or gtfo) which we just don't have time for this time around.