It’s pretty much common knowledge about the pharma industry. But here’s a decent Wikipedia page:
High-income countries have had issues involving expensive patented antiretroviral drugs; for example, in 2016 the TDF/FTV/EFV treatment was approximately $30,000 per patient per year in the US, whereas the generic medication only costed $100 per patient per year
It’s pretty much common knowledge about the pharma industry. But here’s a decent Wikipedia page:
https://en.m.wikipedia.org/wiki/Cost_of_HIV_treatment
The patents all expired by 2016, so this contradicts your claim.