The answer to this question depends on the nature of your product, and what 'class' of medical device it would fall under. Depending on what class it is, the process could be as easy as filling out a simple form and sending it to the FDA, or it could be as hard as a multi-year multi-million dolla...
Can you describe the data in the table? I can think of a few solutions, most if which are based on the data you are storing. For example, chances are when you have large tables you are probably not doing any summarization of your data. If possible pre-compute the result and spit out the answer ...
Unless they are in some way related ie seo clients are weight loss focused you should keep two.