A court heard this week that the experience was "an eye-opener" for Loman Dempsey.
Despite having no previous convictions, Dempsey's (37) disqualification is at the upper end of the scale.
The sentence was handed down at a sitting of Trim District Court after Garda Karl Foley told a judge that the defendant crossed a solid white line on two occasions.
Garda Foley said he spotted Mr Dempsey, of Breffini, Lackanash, driving in a dangerous manner at Newtown in Trim.
He was brought to Trim Garda Station where he provided a breath sample that was over the limit. The judge also fined him €500 for the offence, which occurred on June 8.
Through his solicitor, Dempsey apologised to the garda and to the court, which was told that he understood his wrong doing and wanted to move on with his life.
The case occurred just days after his uncle argued with several Fianna Fail TDs over his plans to curb drink driving.
The new Road Traffic Bill is expected to cut the legal fall from 80mg of alcohol per 100ml of blood to 50mg.
This would effectively mean motorists would be over the limit after one drink, much to the annoyance of some rural backbenchers.
Vintners have also lobbied vigorously against the idea but Minister Dempsey has indicated a strong determination to forge ahead with the initiative.
Loman Dempsey and Minister Dempsey were unavailable for comment yesterday.