NHS Tayside has warned patients may experience delays at accident and emergency departments while the health board switches to a new patient information system.
A&E departments at Ninewells Hospital and Perth Royal Infirmary will switch over to the new TrakCare system on Tuesday.
TrakCare is already used by eight other health boards and will help NHS Tayside move towards a fully electronic patient record.
The new system will mean a patient’s records are held in a single place in order to improve the flow of patient information.
This means medical staff will be able to get a fuller picture of a patient’s current and past medical history, which will help raise care standards.
TrakCare was launched across the rest of NHS Tayside over the weekend.
A spokeswoman for NHS Tayside said patients may experience slight delays at outpatient reception areas and at accident and emergency receptions while the system is being bedded int.
Consultant in emergency medicine Dr Brodie Paterson said patients should only attend A&E when it is a genuine emergency.
Around one in 12 people who visit A&E could receive more appropriate treatment by accessing another NHS service
Dr Paterson said: “At peak times and especially over weekend and holiday periods, A&E can be very busy.
“We need to make sure that we are able to see people quickly if they need emergency care.
“Members of the public have always recognised that the A&E is for those with genuine emergencies, however they are not always aware of what alternatives are out there, especially when their own GP is closed.
“This sometimes leads to them attending A&E only for us to have to explain that we are not the correct place to help. This is frustrating for them and diverts us from other patients.
“With some minor illnesses and injuries it is not always necessary to see a doctor or nurse.”
Dr Paterson added: “Helpful advice can be given by pharmacists and NHS 24. However, if you feel you need to see a doctor or nurse but your GP is closed please phone NHS 24 on 111.
“They can give advice and, if necessary, put you in contact with a GP or nurse in the out-of-hours service.”