Rachman has also tested the effectiveness of this method in treating claustrophobia and found it to decrease fear and negative thoughts/connotations by an average of nearly 75% in his patients. Of the methods he tested in this particular study, this was by far the most significant reduction. Interoceptive exposure
This method attempts to recreate internal physical sensations within a patient in a controlled environment and is a less intense version of in vivo exposure. This was the final method of treatment tested by S.J. Rachman in his 1992 study. It lowered fear and negative thoughts/connotations by about 25%. These numbers did not quite match those of in vivo exposure or cognitive therapy, but still resulted in significant reductions.Other forms of treatment that have also been shown to be reasonably effective are psychoeducation, counter-conditioning, regressive hypnotherapy and breathing re-training. Medications often prescribed to help treat claustrophobia include antidepressants and beta blockers, which help to relieve the heart-pounding symptoms often associated with anxiety attacks. See also
Agoraphobia
List of phobias
Premature burial

References
Bibliography
Carlson, Neil R., et al. Psychology: the Science of Behavior, 7th ed. Allyn & Bacon, Pearson. 2010. Cheng, Dominic T., et al. "Human Amygdala Activity During the Expression of Fear Responses". Behavioral Neuroscience. Vol. 120. American Psychological Association. 14 September 2006. Fritscher, Lisa. "Claustrophobia: Fear of Enclosed Spaces". About.com. New York Times Company. 21 September 2009. Web. 9 September 2010. Gersley, Erin. "Phobias: Causes and Treatments". AllPsych Journal. AllPsych Online. 17 November 2001. Web. 18 September 2010. Hayano, Fumi PhD., et al.
Claustrophobia is the fear of confined spaces. It can be triggered by many situations or stimuli, including elevators, especially when crowded to capacity, windowless rooms, and hotel rooms with closed doors and sealed windows. Even bedrooms with a lock on the outside, small cars, and tight-necked clothing can induce a response in those with claustrophobia. It is typically classified as an anxiety disorder, which often results in panic attacks. The onset of claustrophobia has been attributed to many factors, including a reduction in the size of the amygdala and classical conditioning. One study indicates that 5–10% of the world population is affected by severe claustrophobia, but only a small percentage of these people receive some kind of treatment for the disorder. The term claustrophobia comes from Latin claustrum "a shut in place" and Greek φόβος, phóbos, "fear". Signs and symptoms
Claustrophobia is classified as a mental and behavioral disorder,  specifically an anxiety disorder. Symptoms generally develop during childhood or adolescence. Claustrophobia is typically thought to have one key symptom: fear of suffocation. In at least one, if not several, of the following areas: small rooms, MRI or CAT scan apparatus, cars, buses, airplanes, trains, tunnels, underwater caves, cellars, elevators and caves. Being enclosed or thinking about being enclosed in a confined space can trigger fears of not being able to breathe properly, and running out of oxygen.