What is the U.S. Government's answer to this concern about an unfortunate consequence of sanctions against Iran?

Don't take it just from me: https://t.co/bBPXUXXkf4 illustrates one impact of the Trump administration's #EconomicTerrorism on Iranians; from those directly involved in producing medicine for cancer patients. pic.twitter.com/qUg1716Twc

— Javad Zarif (@JZarif) August 16, 2019