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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 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 the FDA, those formulations contain non-glucose sugars, which can falsely elevate results and increase the risk of insulin overdose.

A spokesman for North Chicago-based Abbott said the company has been working on a new version of its FreeStyle strip that addresses the problems cited by the FDA.

Calls to Swiss manufacturer Roche were not immediately returned Friday evening.