Introduction: Endoscopy and colonoscopy are gold standards for the diagnosis and treatment of gastrointestinal diseases. The success of ambulatory gastrointestinal procedures rely on examination, the cooperation of the patient, drug selection, experience of anesthesiologists with endoscopists. This study aims to assess preoperative anxiety arising from endoscopy and colonoscopy applied successively in endoscopy units, to take precautions accordingly and to compare dexketoprofen and paracetamol for preemptive analgesia. Methods: In this study, 150 patients (ASA I-II,18-60 years) who were scheduled to go under endoscopy and colonoscopy were included. Demographic data (gender, age, BMI), American Society of Anesthesiologists(ASA) scores and education background were recorded. State-Trait Anxiety Inventory I-II(STAI I-II) testes were applied to the patients. Results: Patients were informed by the Numerical Rating Scale (NRS) in the endoscopy unit. Pregabalin was administered one hour before the procedure as per established procedures in all groups. Patients were divided into three groups, paracetamol in group P (n=20), dexketoprofen in group D (n=20), and saline in Group C (n=20) were administered. At the end of the procedure, patients above 2, according to the Ramsay Sedation Scale (RSS), were taken to the recovery room. Their pain levels were measured at minutes 5, 30, 60, and 120 following procedure using NRS. The times to reach above 9 of the modified Aldrete recovery score (MARS) were recorded. There was no difference concerning demographics, ASA, education, duration of anesthesia, endoscopist's and patient's satisfaction, duration of the procedure, and NRS levels. The time to reach MARS 9 was shorter in Group D than Group P, and C. Total propofol consumption throughout sedation was less in Group D compared to Group P and C. Discussion and Conclusion: It is necessary to recognize the anxiety of the patients in the gastrointestinal procedure and to take precautions. By applying preemptive analgesia, the total anesthetic dose can be reduced, and discharge time can be shortened.