By removing the fear of a panic attack happening whenever the person is exposed to a stimulus that has become a precursor to the attack, interoceptive exposure lessens the occurrences of attacks in patients who have received treatment. In short, interoceptive exposure seeks to remove the "fear of fear", where the attacks happen because of the fear of actually having an attack.[1] Interoceptive exposure can be contrasted with in vivo exposure, which exposes the person directly to a feared situation. Interoceptive exposure can be used as a means to induce depersonalization and derealization.[2]