Heavy alcohol use may be a key factor contributing to suicide among military personnel with untreated post-traumatic stress disorder. A study of active military personnel found that heavy drinking amplifies the relationship between PTSD symptoms and the severity of suicidal thoughts. The authors of the study, which is published in Alcohol: Clinical and Experimental Research, recommend that the military health system consider requiring screening for suicidal ideation and alcohol use in service members who may have post-traumatic stress disorder and further develop integrated treatment programs that simultaneously treat alcohol use disorder and PTSD.