Concerns have been expressed that priests celebrating more than one Mass in a day could soon find themselves over the legal limit for drink driving.
Enniskillen-based Fr Brian D'Arcy said the issue was already a concern among some priests in the North, which, like the Republic, is actively considering a reduction in the blood alcohol limit for drivers.
"The shortage of priests has resulted in those who are currently ministering having to say multiple Masses, and often drive from church to church to do so, having drunk from the chalice in each church," he said.
"Perhaps it [celebrating a number of Masses] could be enough for you to fail a drink driving test, and while I don't like to use the word wine, as it is the precious blood in the Eucharist, it still has all the characteristics of wine when in the blood stream," said Fr D'Arcy.
He pointed out that the use of non-alcoholic wine was not an option, as it was not allowed by the Vatican, even where alcoholic priests were concerned.
Fr D'Arcy said he always felt bad himself when getting into a car after celebrating a number of Masses. "As a pioneer myself I am conscious of the danger now that there is zero tolerance here in Northern Ireland of alcohol for people who are driving, and I assume the zero rule is due soon in the South as well," he said.
"Perhaps a small amount would not show up in blood tests but only medically qualified people can decide that. After doing several Masses I often have to drive off immediately to visit some person who may be very ill in hospital," said Fr D'Arcy.
Both the Republic and the North currently have the same blood alcohol limit for drivers of 80mg/100ml, but a reduction in the limit on both sides of the Border is expected within 18 months.
Fr D'Arcy was responding to a Tuam Heraldreport which quoted a north Galway priest as saying that, while he often had three ministers of the Eucharist at some Masses, he sometimes had to finish the wine left over in their chalices as well as his own.
This, he felt, could put him over the legal limit for driving.
"I would often have to read an evening Mass in the church as well as another one in a nearby nursing home and then drive to celebrate a neighbourhood Mass, all in one evening," he said.
"If I only took a mouthful of wine from the chalice at all three Masses I feel that this could put me over the legal limit for driving. But if a call comes in that somebody is nearing death, I have no choice but drive to where that person is and give him or her the last rites," he said.