Label Change for Viagra, Cialis, Levitra

The FDA has approved updated labeling for the erectile dysfunction drugs Cialis, Viagra, and Levitra. The change reflects a small number of postmarketing reports of sudden vision loss attributed to NAION (nonarteritic ischemic optic neuropathy) , a condition in which blood flow is blocked to the optic nerve, states an FDA news release.

Tens of millions of men worldwide have used the drugs. The reported vision problems have been extremely rare.

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