Paramedics are to team up with police officers patrolling the streets of an Essex town.
If it is successful, the scheme will be rolled out across Essex
The move has been designed to cut emergency response times and reduce hospital admissions, Essex Police said.
Medics from the East of England Ambulance Service will join officers in Harlow on Friday evening to put the scheme to the test.
If it reduces the number of calls to the ambulance service, the scheme will be used across the county.
Ch Insp Mike Martin, of Essex Police, said: "It will mean the patrolling officer will have access to instant medical support which is hoped will reduce the number of calls from police to the ambulance service.
"The reduction of calls will free ambulances to respond to emergencies throughout the county.
"If it cuts response times, reduces the number of calls to the ambulance service and provides a better service then we can look to roll it out further."