We’re about to find out whether there will be a way anytime soon to slow the course of Alzheimer’s disease. Results are due within a month or so from key studies of two drugs that aim to clear the sticky plaque gumming up patients’ brains.

A pivotal study of a third drug will end later this year, and results from a small, early test of it will be reported next week at an Alzheimer’s conference in Vancouver, British Columbia.

These three treatments are practically the “last men standing” in late-stage trials, after more than a decade of failed efforts to develop a drug to halt the mind-robbing disease. Current medicines such as Aricept and Namenda just temporarily ease symptoms. There is no known cure.