Gonna bump this one for the sake of knowledge.

Go to a hospital that recieves aid money as they are usually cheaper and not so profit oriented.

Sonja kill gave me a pep cure that set me back 60 dollars for the whole month of combivir.

Shamefully i had to do it again and went to the refferal hospital as they are the ones that hand this medicines out. Note that its not actually allowed to sell those medicines. They are free for locals after a diagnosis. But the guy were super nice. I got a whole months pep and only had to pay 8.000 riel to get myself registred. This was a 3 drug version called acriptega.

160 a week vs 2 for a month

I think, as they get aid for those medicines, its free for locals and not allowed to be sold for money anyway its easy for the guy to just give it to you as its non profit.