There is difference between trading medicine and just "sending" it.
I think this comment explains the issue well: https://news.ycombinator.com/item?id=19481707
I think this comment explains the issue well: https://news.ycombinator.com/item?id=19481707
They can buy medicines for their people instead of buying weapons. Surely buying medicine is more convenient. But the Islamic Republic's mafia is just thinking of itself.