Internet addiction and cyberchondria have a bidirectional relationship. However, no known studies have evaluated the moderating role of anxiety sensitivity in that relationship. The study aimed to determine whether anxiety sensitivity moderates the relationship between internet addiction and cyberchondria among Jordanian nurses. Data were collected from 303 nurses using a web-based survey and convenience snowballing sampling methods using a cross-sectional research design. The Internet Addiction Test and the short version of the Cyberchondria Severity Scale were used to assess internet addiction and cyberchondria. Nurses reported mild internet addiction, low anxiety sensitivity, and moderate cyberchondria. Also, these findings suggested that sensitivity to anxious feelings moderates the relationship between internet addiction and cyberchondria. These findings would help nurses use psychosocial interventions for people with internet addiction and cyberchondria by understanding how their anxiety sensitivity promotes their internet addiction and cyberchondria.