Coming down with the flu can make you feel more than a little queasyabout your budget.

The flu can be expensive for consumers and businesses alike. During the particularly bad 2012-13 season, the flu cost workers $8.5 billion in lost wages from taking unpaid sick days to recuperate or to care for a sick family member, according to Walgreens. And an earlier report from the pharmacy chain found that many people end up spending more than $250 out of pocket to treat their symptoms.