For people taking atenolol, depression may or may not be a side effect. Because the research is unclear, it is important to understand the signs and symptoms of depression if you are using a beta blocker. If you are taking atenolol and depression symptoms become a problem, let your healthcare provider know. Also talk with your healthcare provider if you experience anything that "just does not seem right" while taking atenolol. Your healthcare provider will be able to diagnose and treat the problem.
Also, if you have a history of depression and are prescribed atenolol, talk with your doctor. Together you can decide whether a beta blocker, such as atenolol, makes sense for your particular situation.