Taking a 200 mg dose of Tancodep (imipramine and diazepam) is a significant overdose that requires immediate medical attention. This high dose can cause serious health risks, including severe drowsiness, confusion, blurred vision, and a very dry mouth. More critically, it can lead to dangerous changes in heart rhythm, rapid heart rate, seizures, and slowed breathing. Please do not wait for symptoms to worsen. If this dose was taken, contact emergency services or go to the nearest emergency room immediately. Healthcare professionals can effectively manage these risks if treated promptly.