Apparently, many human trials in the period 1945 - 1960 found it effective for tuberculosis. More recent trials (1990s and on) found it potentially effective for HIV.
Effective human dose was 3g - 6g a day, with higher doses more effective for HIV.
http://cid.oxfordjournals.org/content/36/4/453.long
Effective human dose was 3g - 6g a day, with higher doses more effective for HIV.
http://cid.oxfordjournals.org/content/36/4/453.long