AP -- WASHINGTON — The Food and Drug Administration is warning diabetes patients that certain blood sugar tests can give inaccurate results in patients taking other medications. Public health regulators told consumers on Friday not to use certain glucose testing strips from Roche, Abbott Laboratories and other companies in combination with dialysis and other biologic drugs. According to FDA those formulations contain non-glucose sugars, which can falsely elevate blood sugar results and increase the risk of insulin overdose.