Exeter police say the problem of legal highs can't be tackled properly until legislation to ban them is introduced.
They're calling on whoever wins the General Election to move forward with proposals for new laws, drawn up under the Coalition government.
Locally the substances have led to at least one death as well as many incidents of violence and anti-social behaviour.
Deaths of man and woman in two counties being linked
Woman found dead in Torquay; man in Hampshire
Dawlish's black swan lose nests in floods
At least 10 eggs washed away
Trains cancelled as flood damage continues
Divers to inspect infrastructure
Torbay tourism facing pressures
Bay MP says tourist trade needs stability and help
What is the future of vulnerable but vital Slapton Line?
Millions of pounds have already been spent protecting the road
