Right now, none 0% get better. So saving 25% a huge improvement, and approval will be guaranteed.
Alz might have numerous causes, lack of homeostasis might must be one. Just like there are cancer treatments that only work on some cancers and not others. Treatments that work will be approved and find a market.
And once 273 is recognized and approved, every other alz drug is going to want to run a combo trial with it. Leading to numerous licinsing agreements and upfront royalty payments.
Anavex 273 doesn't magically improve everybody in a few months. It takes time to heal a damaged brain and stabilize the disease process. The drop outs might of been older and/or with more advance disease. More advanced the disease, less notice of benefit and improvement of scores. Age and progression of disease makes a big difference