 A treatment room will be opened at the Millennium Stadium |
Doctors and nurses have set up mobile casualty units to help deal with the problem of drunk and injured revellers during the party season. Units were launched in Cardiff and Swansea on Friday night ahead of one of the year's busiest weekends.
The last Friday before offices close for Christmas had been dubbed "Black Friday" due to the number of incidents.
The emergency "field hospitals" aimed to take the strain off ambulances and accident and emergency departments.
In Swansea, paramedics and nurses opened a GP's surgery in the city centre.
And, in Cardiff, a treatment room was set up at the Millennium Stadium.
Rapid response paramedics, rather than ambulances, dealt with 999 calls from the pub and club areas of town.
Those who had minor injuries were treated at the temporary medical centres rather than taken to the A&E departments.
The units were also due to be set up on Christmas Eve and New Year's Eve.
The initiative came as the Home Office launched the second phase of its crackdown on binge drinking, which targeted 180 town and city centres in Wales and England.
People caught fighting, urinating or being sick in the street were issued with an on-the-spot �80 fines.
 Police will be out in force on the streets to tackle troublemakers |
George Murphy, from the Welsh Ambulance Service, said the mobile units were "an exciting new initiative which will help to provide quicker and more immediate treatment for people on the streets".
Chief Superintendent Bob Evans, of South Wales Police, also welcomed the initiative.
"Through this scheme, we will be able to take services closer to those who need them," he said.
"This scheme will help to minimise the time that people are kept waiting for treatment at such busy times".
Gwent Police said it had learnt lessons from a summer campaign which cracked down on drunken behaviour in Newport and was introducing a similar campaign running until 3 January.
Chief Inspector Dave Johnson said: "Our objective is that the small minority of irresponsible drinkers, who advocate drunken and violent behaviour, are identified and dealt with appropriately.
"We are not looking to spoil a night out for partygoers, we just want to make it safe for everyone."
Dr Peter Richmond, from the University Hospital of Wales, said the temporary treatment centres would reduce the workload on hospital staff and "enable less serious problems to be dealt with on the spot".