This is a significant issue! The pharmacist is violating the Controlled Substance Act, and could be facing both civil and criminal prosecution!
Given the fact that you have suffered personal injury (we generally group claims that arise from damages to the person as "personal injury" not just broken bones and bruises), you would also have claims against him for negligence (and the pharmacy would be liable as well under the theory of "Respondeat Superior"
As these are controlled substances, they are strictly regulated and controlled. There will be records, but you do need to act quickly.
I would recommend contacting a personal injury lawyer as quickly as possible.
(also called trial attorneys)
Fortunately the majority of these attorneys will provide you with a free consultation, and many will represent you on a contingency basis (they will advance the costs of litigation and legal services in exchange for a portion of your successful settlement or judgment).
You can find local attorneys using the State and Local Bar Association directories, or private directories such as www.AVVO.com; www.FindLaw.com; or www.Martindale.com (I personally find www.AVVO.com to be the most user friendly).
You can report a pharmacist to the DEA directly: http://www.deadiversion.usdoj.gov/tips_online.htm - but I would recommend working with your attorney to coordinate this, rather than doing so piecemeal. However, if you cannot get a lawyer right away, this is always an option for you to take independently.