Patients are being told to stay away from their GP for the next month, unless they have an urgent problem.
It's to allow them to double the amount of Covid boosters they do every week, under an accelerated programme.
The GPs vaccinating their own patients will be allowed flexibility to give boosters to people from the age of 16 upwards but will prioritise older age groups.
Vaccine centres will also be open from 8am to 8pm every day, and the 15-minute wait time after a jab has been scrapped.
Dr Denis McCauley, from the Irish Medical Organisation, says GPs are scaling down other care.
"For the next month we'll not be able to do non-urgent care."
He's asked patients with non-urgent medical request, such as regular check ups or routine blood tests, to avoid booking an appointment.
Dr McCauley said anyone with urgent symptoms will receive care.
"Other than that we'll be spending more of our time doing booster vaccines."