The Food & Drug Administration, FDA, has announced that after recalling more than 12 million bottles of high blood pressure meds over the last five years, it expects more may be tainted with a chemical called nitrosamines. Although they are found in trace amounts in anything from water, cured and grilled meats, dairy products and vegetables, in higher doses they can be dangerous.  “The difference is with drugs it’s totally avoidable,†Dr. Stephen Hecht, a University of Minnesota professor of cancer prevention, told USA Today. FDA officials have said the agency expects drug manufacturers who have identified a potential risk to complete testing and report changes that they have made by October 1.