***The medicine has been designed originally to help treat Alzheimer's disease, but could be adapted and licensed for sale in a weaker form within the next few years. One brand of memory-enhancing pill is being developed by the multinational company AstraZeneca in collaboration with Targacept, an American company, while Epix Pharmaceuticals, also from the US, is developing another. Both have "cognitive-enhancing effects" which are aimed at treating patients with age-related memory loss.