I am writing on behalf of my father tukaram who is 77 year old & suffering from parkinson disease in addition to low sodium (at present 130 level normal level 135 to 155). He is also suffering from diabetic, thyroid, high bp, constipation. He is suffering from parkinson from about 1 year. However he was able to walk with support (stick) till one month back. One month back he suffered from low sodium level approx. 120 because of which he was not able to stand also. He was admitted in hospital & in 2 days his sodium level became normal. After that he was taking medicine natrise for maintaining sodium (last one month). From last 4 to 5 days he is suffering from very low energy level (not able to get up from bed, stand), he speaks very less & sleeps all the time. I would like to understand what is reason for the same. Also any medicine.