FYI Guys: This entry in the TSA blog from September 2014 states categorically and unambiguously that nitro pills and sprays are permitted and have never been prohibited.
http://blog.tsa.gov/2014/09/tsa-trav...ling-with.html
Originally Posted by TSA Blog
Nitroglycerin tablets and spray (used to treat episodes of angina in people who have coronary artery disease) are permitted and have never been prohibited.
Of course, a TSO who wants to be a douche can easily pull out the old "the web site is out of date" card. Hard to argue with a douche. But at least you have the blog.