Well, it definately could be a civil case. There is the possibility there may be criminal charges, as well. There is really not enough detail to answer more than that.
I agree with my colleague's assessments, that this could be both, based on the entire set of facts. Good luck.
Disclaimer
This information is offered for informational purposes only, as I do not practice law in your State. It is not intended as legal advice and you should not rely upon it to decide how to resolve this issue. No Attorney-Client relationship is intended or established by this response. You are faced with a situation where you need to consult with an experienced defense lawyer admitted to practice law in your State before you make any decisions as to how to resolve this issue.
When a healthcare provider is negligent, and their negligence causes you harm, it's a civil case. You would file a medical malpractice lawsuit. Not all medication errors are worth pursuing. It depends on the circumstances and the extent of your injuries. An experienced medical malpractice lawyer could help you figure this out.