What is it like to take 'whoonga'?
For years, South Africa's fight against Aids was hindered by a confused and much-criticised government policy.
That has now changed, but tragically there is a fresh obstacle on the horizon. A new drug is gaining in popularity in the townships.
It is called "whoonga" and is a cocktail of various substances. Among them is an anti-retroviral drug used for the treatment of Aids and HIV. With millions of South Africans in need of treatment many patients say they now live in fear of being mugged for their medication.
Here, two recovering whoonga users talk about the drug and the effect it has had on their lives.