Almost 100,000 bottles of nasal spray were recalled for a "microbial failure" that led to multiple complaints from customers.

Just a few puffs into each nostril, and you're protected against infection from nasty cold viruses - that is, according to claims made for many nasal sprays. Can they really do this?Well, not directly ...

But if the end portion of the ileum has been removed, Sandborn says, the vitamin will have to be given as a shot (typically once a month) or an intranasal formulation, such as a nasal spray.