<s>[INST] I have periodic episodes of suddenly feeling that am losing contact with reality.   I have no energy and debilitating malaise.  It takes a huge effort to get through the day.  These episodes last for two or three days. Then as suddenly as it comes on I feel completely normal again.  I have tried to determine a causal effect for these episodes by keeping a food dairy, keeping track of blood pressure and blood glucose. Nothing seems to correlate. I have even tracked the phases of the moon to no avail. Thats how desperate I am to find a solution to this depressing problem.  Please help. [/INST] What is your age and sex? Since how much time are suffering from the same? What is opinion of your family members and friends? If it is for 2-3 days, did you not consult any doctor yet? It can be an episode of derealization and depersonalization.However, it may be associated with your depression or if any brain pathology. You must consult a doctor personally to be examined, investigated and evaluated in detail. </s>