What's flabbergasting about this is that this information has been around for more than 4 years in the AERS system.
Here you can see that there have been 390 cases of anosmia reported to FDA where Zicam was also mentioned.
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Here you can see that, by 2008, adverse event cases for Zicam reported anosmia ~1,000-fold more often than anosmia was reported in all other cases for all other drugs.
This signal is present as far back as Q3 of 2004.