Atenolol bad dreams. I didn't know atenolol did that. As a writer that's not such a bad side effect. . . . . . . . Dieting and excercise have not phased the pounds. . . . He also has the very vivid dreams . . . . . . . caused me to have nightmares 5 days in a row for the first week. . . One reader said: "I was put on atenolol when my blood pressure went through the roofNightmares can be defined as vivid and terrifying dreams . . . . I wake up after each bad dream. extreme fatigue, and exceptio... more