This question prompted me to do a little reading, as I seemed to remember hearing that it sometimes is used for MDD. Turns out that some do use it for that (as an "off-label" use), but it is not without controversy. Apparently, there isn't really much in the way of properly done research studies, and what little there is of that basically concludes that it's on par with placebo results.

Now, I'm certainly not any kind of expert, just found it interesting to read this.

And then went and read more that was longer, a bit broader of a scope and much denser reading. Same conclusion though. Interesting. Think I'm science geek read-out for the day though.

Oh. So, back to the question. Yes, it could. Or not. But sounds like it wouldn't suggest anything beyond its working. Or not.