HQC is not a patented drug and sells for around $3/dose. It is manufactured by dozens of companies around the world.
The drug he does say works somewhat is Remdesivir which is patented and made by only one company, Giliead. It sells for $550/dose.
https://abcnews.go.com/US/covid-19-drug-remdesivir-cost-3120-us-patients/story?id=71509977