Devon and Cornwall Police claim a fifth of their time is now spent dealing with people who have mental health problems.
They say shrinking budgets are causing tension between police forces and healthcare providers.
The force's Assistant Chief Constable Paul Netherton says it's unacceptable.
How Torbay Hospital bosses are tackling 'risks'
Poor state of buildings impacting staff and patients
RD&E and North Devon hospital waiting times slashed
It's still one of lengthiest in the country
Bus service changes leave villagers in North Devon stranded
Petition started to reinstate former direct route from Barnstaple to Exeter
Demand for action over Teign sewage spills
'This represents a risk to health for residents and visitors'
Cyclist critically injured in Sidmouth
Man, 20s, airlifted to hospital
Council owed £4 million by its own housing company
But it won't sell Mary Archers for student flats
