In a post on social media, Police warned islanders over the so-called party drug, which can in some circumstances be fatal.
“Please remember not only are these drugs illegal, they can cause serious illness or even death,” a spokesperson wrote.
It’s the latest of a number of drug warnings this summer following the death of an 18-year-old shortly after taking the class A substance.
Police also issued an alert regarding blue and yellow pills branded as ‘IKEA’, which were said to be stronger than usual, and a later batch featuring the Barcelona FC crest.
Anyone concerned about the pills is advised to seek medical attention.