The present invention is directed to methods of treating or preventing the development of cardiovascular disease by administering compounds that stabilize mast cells. In addition, it includes pharmaceutical compositions which have both a mast cell stabilizer and instructions regarding the use of the stabilizer in treating or preventing cardiovascular disease. The methods and compositions will be of particular value for preventing aneurysms of the abdominal aorta in individuals with atherosclerosis, diabetes, hypertension or a family history of aneurysms.