Summary Background: Communication in health care is an important aspect to maintain a patient-safe care. In intensive care, critical situations can arise, a critical situation can mean that a patient becomes acutely impaired, which means that the intensive care nurse must handle the care accordingly. In these situations, several doctors and nurses gather at the patient's premises and the environment can be perceived as stressful. It is in such situations that communication can be lacking in connection with verbal prescriptions and that several people communicate at the same time.Aim: The aim of this study is to investigate intensive care nurses' experiences of communication in critical situations. Method: A descriptive design with a qualitative approach was used. Nine semi-structured interviews were conducted that were analyzed with a qualitative content analysis. Results: In the present study about intensive care nurses' experiences of communication in critical situations, four categories emerged; Communication inand outside of the team, The importance of professional experience can give safety, The importance of oral prescriptions in critical situations and Intensive care nurses' perceived feelings in critical situations. The intensive care nurses who participated in the study considered that there were great risks with lack of communication and mainly the verbal prescriptions that occur in critical situations. More experienced nurses felt that they could question the prescriptions more than those who were less experienced. Conclusion: The conclusion is that the experience of intensive care nurses gives a self-confidence. There are shortcomings regarding communication within the intensive care team in critical situations, which can be a risk to patient safety. Experience was perceived to be important in critical situations. Practice and clear routines should be able to reduce the risks in these situations.  Keywords: Intensive care nurse, Communication, Medical errors, Oral prescriptions, Patient safety