question: My father is suffering from :1. Ascites due to Liver Cirrhosis2. Surgical pain as his gall bladder was removed surgically due to gall stone in last 48 hours. Doctor suggested him TRAMADOL ( opioid) for pain management.3. He is suffering from constipation for almost 48 hours. Is it an sign of impending attack of Hepatic Encephalopathy ?His cognitive functions are all ok.