That's a patently ridiculous reason to make a drug illegal to own without a prescription. Should we also outlaw non Rx toilet paper? Hospitals have supply chains that are separate from pharmacies and grocery stores. This is a non sequitur.

What about masks? Should they be preemptively made Rx only when all this is said and done because people hoarded them?

What about the fact that evidence of Chloroquine's likely effectiveness has been around in the form of published studies for at least a month and a half and doctors still are barely testing it? What percentage of doctors do you think keep up with literature?