ZURICH , Switzerland Franz Humer, the chief executive of Roche Holdings has said that he is not worried that the demand for the flu drug Tamiflu is tapering off, according to Thompson Financial.

The company will even continue to market the drug for the normal flu season. He said the period when governments were stockpiling the drug in case of flu pandemic outbreak was a "very welcome phase" but that Roche had also anticipated that demand would slow.