Reader Question: I like using zinc nasal gel when I feel a cold coming on, but I've heard that it can affect your sense of smell. Is this true?
On Call Response: Anything that forms a barrier against the lining of the nose (nasal mucosa)—whether it's a nasal gel you apply or mucous build-up from a cold—has the potential to interfere with your sense of smell. The good news is that the problem should be temporary. That said, I did once read about a lawsuit filed by people who claimed that zinc nasal gel had permanently damaged their sense of smell. However, none of my patients have reported this problem to me, and it's unclear whether the product was really to blame. If you're concerned, consider taking zinc orally instead, in the form of a lozenge.
The bigger question is whether or not zinc really works. Unfortunately, the jury is still out. Several studies have found that zinc may help shorten the duration of a cold, but probably won't prevent you from getting sick in the first place. My advice: If zinc makes you feel better, use it. If not, try a saline nasal gel, which can help soothe an irritated nose. And always remember to wash your hands frequently or use alcohol-based hand sanitizers, since good hygiene is still the best way to prevent catching a cold.
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