A Calgary mother fears that her nine-year-old daughter's seizures may return after her doctor declined to renew the girl's medical marijuana prescription.

Sarah Wilkinson's daughter Mia used to suffer from up to 100 seizures a day, and took 30 to 40 pills a day to manage her health.

But two years ago, Wilkinson found a doctor at Alberta Children's Hospital who prescribed Mia medical marijuana.

Wilkinson said she initially had reservations giving her daughter medical marijuana, but it has dramatically improved Mia's health.

"I myself was uncomfortable giving my daughter THC, until it started working," Wilkinson told CTV Calgary.

Mia has been seizure-free for one-and-a-half years now, and has weaned off her medications completely. Now, Mia only takes medical marijuana in oil form, which she takes orally.

In a recent email, Mia's doctor shared some positive news about a test of Mia's brain.

"Just reviewed the EEG. Completely normal awake … miracles happen!" the email said.

In June, Wilkinson wrote to Mia's doctor to renew her medical marijuana prescription. He declined, telling her that he is not permitted to fill the renewal because of hospital policy.

The doctor wrote to Wilkinson: "Due to the strict nature of the policy implemented here at Children's, I am not allowed to fill the forms for renewal of medical marijuana."

The doctor suggested seeking another physician to fill the prescription, but Wilkinson hasn't been able to find one.

She says that without the prescription, her daughter's health is at risk. "It's completely devastating. If she doesn't get this, I'll lose her, and I can't have that happen," Wilkinson said.

The doctor is out of the country and could not be contacted, but has previously declined CTV Calgary's request to discuss Mia's treatment.

Alberta Health Services says its position on medical marijuana for children has not changed since it was implemented almost two years ago.

In a statement to CTV Calgary, the provincial health agency explained its stance.

"Alberta Health Services does not support the prescription of medical marijuana for pediatric patients with epilepsy at this time," the statement said. "Physicians provide prescriptions on a case by case basis using their professional judgment.

"Health Canada has not approved medical marijuana for the treatment of seizures in Canada, and AHS is unaware of any studies, data or recognized epilepsy organizations that recommend or endorse the use of medical marijuana in pediatric patients with epilepsy."

Wilkinson said Mia's prescription is running out, and she can only use medical marijuana for another three weeks.

"I'm not going to watch her die," she said. "If I don't find a signing doctor, I guess I risk going to jail or having my children taken away. But I'm not just going to watch her deteriorate and seize to death."

Wilkinson is appealing the decision to deny Mia's prescription renewal to the Alberta Children's Hospital ethics board.

If the appeal is unsuccessful, Wilkinson plans to contact her MLA for assistance.

With a report from CTV Calgary's Kathy Le and files from CTV Calgary