Have you heard of chloroquine already? It's the drug Pr Raoult said it could be useful to cure Covid (it's used for malaria already), in a Youtube video, to the eyes and ears of everyone. In France, the labs that produce it decided to gather all their stocks in case it'll be used against coronavirus eventually.
The issue is that the main purpose of this drug is to treat patients with lupus. And they need it to survive. And now drugstores are out of it, because the labs retain them.