“...TEVA Pharms makes generics of both PQL and AZT and is donating 6 million doses to US starting now to the end of March. Azithromycin is not in short supply, and is not particularly hard to make (Israeli firm TEVA Pharms makes a generic of AZT too, as do about 10 other companies)....�
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Mylan is reopening a shuttered West Virginia manufacturing facility and expects delivery of product beginning in early April. I’m pretty sure the facility is in Morgantown WV. They have necessary “raw materials� on hand for 50 million tabs. This is important because of the possibility of supply constraints on precursor stock.
http://newsroom.mylan.com/2020-03-19-Mylan-Ramps-Up-U-S-Manufacturing-of-Hydroxychloroquine-Sulfate-Tablets-to-Meet-Potential-COVID-19-Patient-Needs
I believe there are 7 to 8 CURRENT manufacturers of Hydroxychloroquine and more gearing up to manufacture.