You may find it helpful to take a look back at what they ran out of first in Venezuela when the economic collapse began there. This is another older piece but it's interesting to consider whether we're going to see the same shortages - and
to figure out how to prepare for it.
This was written several years ago about the slow collapse many were experiencing. The timeline just sped up dramatically with the lockdowns and their effect on the economy. Some of these tips may be helpful if you're feeling the crunch right now.