West Midlands Ambulance Service's New Year's Eve warning
New Year's Eve revellers have been warned anti-social behaviour towards West Midlands Ambulance Service staff will not be tolerated.
The service says the night is usually the busiest of the year.
Additional ambulance crews are being lined up to cope with what is predicted to be double the normal workload over the weekend.
A spokesman said they would "work tirelessly" to ensure any abuse was dealt with by the courts.
The service's head of security, Steve Elliker, said: "Sadly, if this year is like the last few, we will have staff who will experience people shouting abuse at them.
"Others will be kicked and punched and even spat at by patients and their friends and family.
"Make no mistake, wherever possible, we will press charges."
Last year the service received 2,050 calls for the nine-hour period between 20:00 GMT on New Year's Eve and 05:00 GMT on New Year's Day.
On average it gets around 2,500 calls for a whole day and people are being urged to think before dialling 999.