A new campaign from North West Ambulance service will see people who attack ambulance crews banned from pubs in Liverpool city centre.
Crews say that incidents of verbal or physical abuse against paramedics get worse in the run up to Christmas.
The campaign is backed by the Liverpool Pub Watch scheme that represents more than 100 pubs and clubs in the city.
Anyone arrested following an incident will be banned from the city centre for six to 12 months.
Dave Kitchen, from the Cheshire and Merseyside Ambulance Service, said: "We've had incidents where crews have been bitten, punched and a few months ago someone received a knife wound."
The Chamber of Commerce who run the Pub Watch scheme, have circulated posters and banners throughout pubs and bars in Liverpool city centre.
Pubwatch Manager Joe Curran said licensees were "keen to send out the message that violence and abuse of ambulance staff will not be tolerated".