do i have a case if a nurse makes a mistake.

I am sorry to hear about this.  The question is whether you were caused any actual harm as a result of the medication being set at a higher dose.  If you were not  harmed or only "could have been" harmed, then you likely do not have a case.  Medical malpractice cases are extremely difficult to prove in court and usually you must have pretty severe damages to move forward with a medical malpractice case.  In addition, you would likely need to employ an expert witness (usually another doctor or nurse) to testify on your behalf stating that the nurse's conduct was below the standard of care and that your injuries were a result of such.  Expert witnesses can be very expensive.  If you were harmed as a result of the nurse's conduct and would still like to pursue such, I recommend you request your medical records from the visit and any other health care visits (like hospital or clinic) that you incurred as a result of the harm and start contacting local medical malpractice attorney's in your area.  Best of luck. NOTE:  This response is general in nature and should not be considered legal advice.  No attorney-client relationship exists or is formed by this response.