No it isn’t. It’s due to training. You can’t just walk into a production facility and start making Zoloft. And there is absolutely no guarantee that you will get enough people trained to know how to make Zoloft to keep up with demand. Because that, in part, is based on people’s willingness to work in a Zoloft production facility.
So unless you’re talking about forced labor, that is an example of supply not necessarily meeting demand.