A teenage boy was taken to hospital in Guernsey on Saturday night after taking a so-called 'Facebook' ecstasy pill.
He was admitted after he started suffering seizures at around 10:30pm.
'Facebook' pills are usually imprinted with Facebook logos, such as the thumbs up or lower case f.
The boy says he cannot remember any detail of the design of the pill.
Guernsey Police are investigating and anyone with information should contact them.