Billy Caldwell has been discharged from the hospital after resuming treatment with medicinal cannabis oil. The U.K. boy made international headlines after border officials confiscated his medicine at Heathrow Airport last week. The main active ingredient of the medication is CBD, but it also has enough THC to make it a Schedule 1 controlled substance.

Charlotte Caldwell, Billy’s mother, told the BBC that the improvement in the boy’s condition proves the medicine works. But she also said that the government should change its policy in order to help other sick children.

“The fact that Billy has been discharged is testimony to the effectiveness of the treatment and underlines how vital it is that every child and every single family affected in our country should have immediate access to the very same medication,” she said.

Billy began taking the medicine Tilray in the United States in 2016. Then last year, Billy became the first U.K. patient to receive a prescription for a medical marijuana treatment. But last month, the government announced that those prescriptions would end. So with one dose of the medication remaining, Billy and Charlotte flew to Canada for help. The Hospital for Sick Children in Toronto replenished Billy’s medicine, and the pair returned home. They were met by border officials when they arrived at Heathrow Airport on June 11, and Billy’s medication was confiscated.

Within hours of the first missed dose, Billy had his first epileptic seizure in months. After suffering a series of several more seizures, paramedics rushed Billy to the hospital on June 15.

Government Returned Medicine Saturday

At first, the U.K. government said that it would not return Billy’s medicine. Instead, the Home Office suggested the Caldwells

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