Prana's drug was a good candidate for failure. It was not reversing the effects of Alzheimer's like A2-73, just possibly slowing progression.
Macfarlane's enthusiasm during the Prana trial was directed at one patient. Currently, his enthusiasm is for the entire A2-73 trial.
Macfarlane said that the drug seems to have slowed the progression of the disease by about 30 percent in patients with mild Alzheimer’s compared to placebo.