Study drug will be spironolactone. The starting dose will be 25 mg orally every day, which will be increased to 50 mg every day, if tolerated after 4 weeks. A matching placebo will be used for the placebo group. The VA pharmacy will prepare and provide the study drug as well as the placebo. The pharmacy will create and maintain the randomization numbers in a safe place so that the investigators and the study nurses remain blind to the whole randomization process all throughout the study period.