A warning is being issued about the potentially fatal 'new psychoactive substance' known as CHMICA or CHMINACA.
Jersey's Alcohol and Drugs Service and the police are worried the drug could be available on the islands' streets.
We are told the drug has similar effects to cannabis but is one hundred times stronger.
It has been linked to deaths in Europe but there are no known deaths in Jersey.
The drug can cause convulsions, raised blood pressure, heart attacks and psychoses.
This is one of the most dangerous synthetic cannabinoids that we have seen in Jersey so far because of the unpredictable and potentially fatal effects it can have.
Anyone who has used the drug is advised to seek medical help.
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The weekend event coincides with International Pride Month and the 51st anniversary of the Stonewall riots.
The scheme has been backed by the island's Lieutenant-Governor, and is the first of its kind in the Channel Islands.
Sunny spells and isolated light showers. After dusk fair spells with isolated showers.