Abstract Background: We have chosen to focus on prehospital pain. Patient's pain assessment VAS reach 4 or more to get pain killer, according to the guidelines the ambulance services in southern Sweden goes after. We have chosen to focus on the fentanyl intranasally, as this is a common measure prehospital. Aim: is to investigate the analgesic effect of nasal fentanyl in adults, prehospital. Method: A quantitative retrospective study was preformed in the form of medical examination review by Paratus. A review template formulated to bring out the essence of the records. The study consisted of 88 records. A big falling out was because it was missing after a value of pain assessment of fentanyl. Results: The two largest groups that had received fentanyl were neck/back pain and flank/abdominal pain. The chi-squared test and t-test revealed that no difference existed between power groups and dose of drugs, age and female/male, in the flank/abdominal pain and neck/back pain. No difference was found between female/male and the given drug doses. The chi-squared test revealed that there was a significant difference between the flank/abdominal pain and neck/back pain, in comparison between power groups "no effect" and "good effect". Conclusion: New survey recommended if fentanyl have different effects depending on the method of administration, venous access when intranasal analgesia given and documentation of pain.