A highly dangerous synthetic cannabis is either sprayed on to herbal smoking material or added to cigarettes in powder form.
Public Health England says the chemicals known as 'spice' can cause sickness and convulsions - and while there haven't been any cases recorded in Devon, the substance may well be available here.
The Exeter drug and alcohol charity RISE wants to pass the warning on to local residents.
Tens of millions to be invested in Devon's buses
Local leaders will decided how money is spent
Fawlty Towers: The Play - REVIEW
Chaotic tribute act to renowned series
Lib Dems hold Exmouth seat in by-election
Fran McElhone wins the Halsdon seat
Paignton YMCA moves into former Mormon chapel
Our new home is absolutely ideal'
Homes to be built on former Exeter driving range
More than 50 houses planned
Extra staff to improve adult response times
Two-day target only hit in one in every 10
