###Human: Will fasting and lack of sleep cause delirium? ###Assistant: Hi. The answer to your query is yes. Prolonged fasting and no sleep can cause mental and physical symptoms similar to mania or delirium or coma. It would have been helpful if serum electrolytes, catecholamine levels, and urea levels were recorded or mentioned because BP is on higher side. The advice for adequate rest and a proper diet is also correct. It may be beneficial to visit a counselor to prevent such episodes in the future.