The lack of food and medicine in Venezuela is purely the Venezuelan government's fault, and Jorge Arreaza (an in general, the entire Venezuelan government) has used the US as a scapegoat for the past 20 years.
https://uk.reuters.com/article/us-venezuela-gold/venezuela-g...
We live in a highly interdependent and interconnected globalized world. Lack of access to the global market hurts Venezuelan farmers, leaving them unable to export their excess and cushion local market fluctuations. It has also hurt Venezuelan consumers unable to purchase imported goods with their Bolivars, rendering them worth less.
Medicine is a patent-encumbered, capital-intensive industry that is protected at the WTO level[1]. When your economy is highly specialized (due to globalization, the post-colonial resource curse, political pressures and/or brain-drain emigration) it becomes dependent on foreign imports of medicine. When those suppliers become malicious, a shortage is what emerges.
No one is blameless, but we must examine the situation with a clear understanding of the actors with power and the actors without.
[1] https://journals.plos.org/plosmedicine/article?id=10.1371/jo...
Why do you claim the US sanctions are to blame, when said sanctions have only been applied to individuals? (Unless there are new ones I'm not aware of).