I'm going to be vague so don't ask for more, but I recently had a minor medical problem, nothing life threatening at all. I was prescribed a long course of X f

I'm going to be vague so don't ask for more, but I recently had a minor medical problem, nothing life threatening at all. I was prescribed a long course of X for it. My complaint responded well to that, but near the end of the course I got a new batch from an Indian generics company. They tasted far less bitter (all the pills from all sources were uncoated so it was very noticeable), and the complaint I had flared up again rapidly even while I was taking them. I reported this to the body was responsible, giving them the batch number I'd saved. They re-analysed a sample from that batch (they keep back a sample of each) and said it was OK, but I'm pretty sure it wasn't. Stupidly I'd taken all the suspicious tablets when should have kept one back for them. My story. Not solid but all I've got. If it had been something serious, I dunno... (BTW this line "I'm sure that there are all sorts of dodgy pills ending up in unregistered pharmacies in the developing world" isn't kind. Their lives still matter, distance and poverty don't change that. I appreciate that may not have been the way you intended it though)