This compares to almost half a million breath tests for alcohol over the same period.
There were initially plans to carry out 50,000 drug-driving tests a year.
The figures, which were obtained by Independents 4 Change TD Tommy Broughan, show the number of alcohol and drug tests carried out on drivers at 101,965 garda checkpoints across the country.
1,939 drug-driving tests were carried out, compared with 472,165 breath tests for alcohol.
Source: Irish Examiner, 19th October 2018