What Is The Treatment For Memory Loss?

My brother aged 46 years have been suffering from loss of memory since 13.01.2011. He admitted to AMRI Hospital, Kolkata. At the first stage of treatment the composition like creatinin, urea are in the upper level but now blood report is normal. MRI- shows limbic influmb, CT Scan- show normal, ECG-Normal, Chest X-ray- normal. It is needless to mention that my brother had affected by Harpic Joster around one year before. What should I do?