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This was suggested, along with using "noindex" URL content to populate the iframe.

We work with a number of pharmaceutical sites that under FDA regulation must include an "Important Safety Information" (ISI) content block on each page of the site.  In many cases this duplicate content is not only provided on a specific ISI page, it is quite often longer than what would be considered the primary content of the page.  At first blush a rel=canonical tag might appear to be a solution to signal search engines that there is a specific page for the ISI content and avoid being penalized, but the pages also contain original content that should be indexed as it has user benefit beyond the information contained within the ISI.  Anyone else running into this challenge with regulated duplicate boiler plate and has developed a work around for handling duplicate content at the paragraph level and not the page level?

One clever suggestion was to treat it as a graphic, however for a pharma site this would be a huge graphic.

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