BIRMINGHAM, Ala. (WIAT) — They are parents who love their two-year-old daughter.

“Libby has a wonderful disposition,” mother Kathryn Hagan described her baby girl. “She is finally sleeping through the night. We got her medications figured out to where she is at her happiest,”

Lane Hagan said Libby is a daddy’s girl.

“It’s really hard to put into words how happy she can make you feel,” he said. “To see someone has fought so hard and gone through so much in her short life and she’s able to smile and show that little personality off–it is truly amazing.”

It is amazing, considering what happened before Lane and Kathyrn Hagan’s first born ever left the hospital. Libby had complications at birth and was taken to the Neonatal Intensive Care Unit at Brookwood Medical Center.

“She came out struggling to breathe and they immediately took her to the NICU. I was able to glance at her and Lane went to take her to the NICU where she stayed for a little over a month,” Kathyrn recalled. At first she was making progress. “There were some scary moments at first–touch and go. After about a week, she turned the corner and started to make good improvements–very encouraging report from the doctors.”

According to Jefferson County Court Records, Libby Hagan was given an overdose of insulin inside the NICU at Brookwood Medical Center. The Hagan’s are suing Brookwood Medical Center on their daughter’s behalf. The hospital admits to the “insulin error” in the court records.

“It was day 12,” Kathyrn said. “When we left that night, she had a high glucose, blood sugar and they gave her an overdose of insulin. It wasn’t just an overdose. It was a massive overdose–one hundred times what she should have been given.”

A nurse herself, Kathryn could not fathom how this happened. Insulin is a high alert medication. When it’s administered in the hospital, it requires checks and double checks and even more safety checks when infants are involved.

“My heart sunk, because I was thinking, I know when your blood sugar is zero for that amount of time. I was like it’s damaging–devastatingly damaging–and my thought was, I don’t know if she is going to be able to rally back from this one.”

Hare Wynn Newell and Newton attorney Leon Ashford is representing the Hagans in their lawsuit against Brookwood Medical Center.

We contacted Brookwood Medical Center who told us, “Due to pending litigation, Brookwood Baptist Health is unable to discuss this matter outside of the legal process at this time. Further, HIPPA regulations and other statutory requirements prevent us from discussing confidential patient information.”

Attorney Leon Ashford says the Hagans are telling their family’s story because they don’t want another child to be given an insulin overdose inside a hospital.

“That night there were policies and procedures at Brookwood if followed would have avoided this medication error,” Ashford said.

According to the Jefferson County Court records we obtained relating to this case, the defendant, Brookwood Health Services admits “the pharmacy sent undiluted adult insulin to the NICU and the nurse administered it. The medication error resulted in Libby being given 60 units of insulin as opposed to .6 of a unit—an error of 100 times the amount of insulin ordered and appropriate for this infant.”

But the hospital claims in the Jefferson County Court records that “it is unclear what extent of injury resulted from the insulin error.”

Katharine Hagan says when she was given MRI images of her daughter’s brain after the massive overdose, “it was like an atomic bomb went off in her brain.”

The Hagan’s attorney says their daughter has irreversible neurological brain damage. Watch the video above to hear more from them and their attorney.

Below are resources if you’ve ever experienced a medical error: