Background & objective: Recovery state or post - anesthetic awakening is one of the most dangerous anesthetic stages. Respiratory, cardiovascular and other complications such as nausea, vomiting, shivering, pain and restlessness have been reported. This study designed to investigate prevalence of this complications and its probable risk factors in Ardabil Fatemi and Alavi hospitals. Methods: In this prospective study, 160 patients were selected in Alavi and Fatemi hospitals during winter of 2001. We completed a sheath for everybody about their history of medical diseases, pervious history of anesthesia, addiction, drug abuse, smoking, physical class of ASA, type of anesthesia, time and place of surgery. Data was analyzed by SPSS software.Results: These results were obtained in patients after surgery in recovery room: shivering 36.3%, pain 26.9% , restlessness 21.3% , respiratory complications 13.8% , cardiovascular complications 12% , nausea and vomiting 8.8% . We found significant correlation between some risk factors with complications, e. g: shivering with history of medical diseases, drug abuse and place of surgery and so, pain with restlessness, respiratory complication and place of surgery.Conclusion: This study according to similar studies revealed higher prevalence of some of post - anesthetic complications as shivering, pain and restlessness in our samples.