My father has recently been diagnosed with HE after displaying symptoms for over 3 years. Until recently, his symptoms seemed to fall under Stage 3, but his most recent episodes resulted in him being in a comotose state. He was not unconscious but was unresponsive and unable to move or communicate. He is now on lactulose and antibiotics again and he seems much better. My concerns are that he is obviously experiencing severe symptoms and I would like to know if anyone else has been, or knows someone, who was diagnosed late on and what their prognosis was. Thanks.