"While each person abusing drugs may display different signs of using, there are some signs that are commonly seen. Some of the most common are unusual mood swings, poor memory, anxiety and hyperactivity. I always encourage new addiction nurses to trust their judgment. Especially as we get to know our patients, it becomes easier to pick up on things that are not the 'norm' for that client. Further, I like to encourage new nurses to report any suspected slip or relapse right away, so that the care team can evaluate the patient and see if there is validity to the concern."