Hi, How are you? My name is Dr Suresh Raghavaiah. I am a liver transplant surgeon and I hope to answer your question today. By the history you have provided, I am worried that he might be suffering from hepatic encephalopathy which is a complication of liver cirrhosis. Encephalopthy can be precipitated by a lot of things (infections, medications, etc) but in most cases it is easily treatbale. In your Dad s case, it could very well been brought on by the proxyvon tablet, but infections have to be ruled out. Please let me know your geographical location so i can guide you to the nearest liver specialist. Hope this helps and hope your dad starts to feel better. Dr Suresh Raghavaiah