The most common side effects include central nervous disorders such as headache, dizziness, tremor, drowsiness, cardiovascular disorders, dry mouth, constipation, nausea and sweating. In addition, confusion, concentration difficulties, libido reduction, hypomania, mania, anxiety, paradoxical insomnia and nightmares are possible.
Due to the risk of a possibly life-threatening serotonin syndrome, amitriptyline must not be used simultaneously with MAO inhibitors!