Prosecution should only be an option in this case:
If the company has in any way hindered you financially. This can include affecting job performance or unexpected medical bills. Yes, the company is at fault for distributing a faulty product, but as you ponder (which I have to offer you kudos for, seeing as most people take the opportunistic approach of suing another), should the product have affected you in no real way, that's when most prosecutors claim 'emotional damages', and the reason most people use this in a case is because the term is so vague that doctors can rarely diagnose trauma in terms of what exactly caused it, and of course, a lot of prosecutors know someone in the medical profession who are willing to falsify medical reports. That would be an example of the prosecution fudging details to their favour, and wrong. I.E. If it's not true, don't make it look true.
The be all and end all of it is; do what you think is right. If you feel there's no need to sue someone, because it really hasn't affected you that much, then don't, or that you can take someone else's money simply because the opportunity has arisen, then don't, that's tantamount to stealing.
The judicial system is already being abused as it is, and to be fully honest, a case against a pharmaceutical company is a hard one to win. Even if you hire a very good attourney, you can guarantee that the company will have a staff of lawyers working on retainer for any such eventuality.
Hope this has offered some insight.