The Irish Medical Organisation says GP surgeries, hospitals and ICU units are under "extraordinary pressure" from the high levels of Covid-19.
It says the recent rise in cases will mean fewer beds are available to treat non-Covid cases and limit the ability to tackle waiting lists.
There are 486 patients in hospital with the virus as of last night, including 75 in intensive care.
RCSI Senior Lecturer, Eoghan De Barra, says covid patients are taking up a lot of room in ICU: