Anderson Cooper's older brother, Carter Vanderbilt Cooper, committed suicide on July 22, 1988, at age 23, by jumping from the 14th-floor terrace of Vanderbilt's New York City penthouse apartment. Gloria Vanderbilt later wrote about her son's death in the book "A Mother's Story", in which she expresses her belief that the suicide was caused by a psychotic episode induced by an allergy to the anti-asthma prescription drug salbutamol. Anderson cites Carter's suicide for sparking his interest in journalism. "Loss is a theme that I think a lot about, and it’s something in my work that I dwell on. I think when you experience any kind of loss, especially the kind I did, you have questions about survival: Why do some people thrive in situations that others can’t tolerate? Would I be able to survive and get on in the world on my own?"