Healthcare professionals were recently warned by Exubera manufacturers, Pfizer, that the insulin might be linked to lung cancer. The short-acting insulin is breathed through the mouth as an inhaler, and it helps control high blood sugar in diabetic patients. Many like the inhaler as opposed to taking insulin injections.

However, six people taking the insulin have been diagnosed with lung malignancies, but studies aren’t conclusive as to whether these malignancies were caused by Exubera or by other factors. In fact, all the patients who were diagnosed with malignancies were previous cigarette smokers.
 
Exubera is only available in limited quantities, and Pfizer is advising doctors to seek alternative medications for the time being.
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