Why Is Aids Medication So Expensive High-Intensity Anti-RetroViral Therapy For HIV/AIDS; Which Combination Is Most Effective??

High-Intensity Anti-RetroViral Therapy for HIV/AIDS; which combination is most effective?? - why is aids medication so expensive

How many kinds of different brands of drugs against AIDS are generally availalble? Who is cheaper? What is more expensive? Which combination is more effective in curbing the HIV virus over a long period and why?