An influx of synthetic cannabis-related callouts in September contributed to a 33 per cent year-on-year increase for Lakes Territory St John Ambulance staff.
The annual increase of callouts was 9.8 per cent (about 1000 more jobs), above the 8 per cent national average.
Lakes Territory manager Steve Lynch said the incidents were cyclic in nature due to sporting seasons and tourist numbers during summer.
"Right now we are seeing a slight drop off as summer approaches and winter sports have wound up," Lynch said. "Come December/January there will be another increase as summer sport is in full swing and there is an increase in population because of the holidays."
Lynch said the extra callouts did put extra pressure on staff, however the Lakes Territory had been lucky to be one of the first areas to have double-crewed ambulances rolled out.