Kildare's Coroner is Head of the Medical Bureau of Road Safety.
Kildare's Coroner says there has been a "huge" increase in instances of drug-driving.
Prof. Denis Cusack is also head of the Medical Bureau of Road Safety.
The organisation says incidents of drug driving jumped by 11% in the first quarter of the year.
And there was a 37% rise in the number of blood and urine specimens submitted for drugs testing in 2020 compared with 2019.
Prof. Cusack, speaking to Kildare Today, says it can be a challenge keeping up with new kinds of drugs.
Prof. Cusack joined Clem Ryan on Wednesday's edition of the programme.

Man In His 30s Dies After Being Struck By Bus On N7 At Kill
Loved Ones To Say Final Farewell To Ryan Weir Gibbons On Friday As Funeral Details Announced
Kildare Animal Welfare Group Condemns Dog’s Death After Suspected Firework Attack In Meath
Pedestrian Hit By Bus On The Naas Road Near Kill
BREAKING: Emergency Services Currently Attending Major Incident On N7 Northbound
"Memories We’ll cherish Forever": Friends Mourn Ryan Gibbons As Murder Inquiry Begins
DJ Carey To Be Sentenced On Monday - Barrister Pleads For Leniency Citing His "Stunning Fall From Grace"
Vape Users Bulk Buying Ahead Of New Vape Tax To Come Into Effect Tomorrow