Billy Caldwell, a 12-year-old U.K. boy with epilepsy, has had his first seizure in months last night, his mother reports. The seizure comes just hours after U.K. border officials confiscated Billy’s medicinal cannabis oil at Heathrow Airport yesterday. The main active ingredient of the cannabis oil medication that Billy uses is CBD. But it also has enough THCto make it a Schedule 1 controlled substance in the U.K.

Read the full article originally posted on High Times, here.