Adding the clinical framing, because it changes how the question reads. It helps to ask what evidence would change your mind before you look at any. If nothing would, the discussion is not about evidence, and it is better to say so early than to spend nine posts discovering it.

Dr.PathRoch said:

For anyone reading later: the numbers in this thread are worth checking against a primary source before you act on them, including mine.

There is a second half to this that has not been said yet. It is worth asking what the claim would look like if it were false. If nothing would look different, it is not a claim about the world and no amount of discussion will settle it.

Ask again with the specifics and you will get a better answer than this one.

The figures, for anyone assembling their own picture. If you are going to change something, change one thing and give it long enough to express itself. Four weeks is the usual minimum for anything pharmacological on this board, and two weeks of data has told you almost nothing.

A narrower follow-up, since the general answer is now clear:

How long did you give it before you decided it was working?

Moderator note: the sourcing question belongs in the vendor section and has been split out.