New figures show more people using medical cards are taking anti-depressants.
There has been an increase of 50,000 over five years.
The data, from Fianna Fáil, reveals that 391,603 medical card holders were on anti-depressants in 2016.
Among the top drugs prescribed were Amitriptyline, Sertraline, Escitalopram and Mirtazapine.
The party's mental health spokesperson James Browne said while he had no doubt doctors are properly prescribing the medication, something needs to be done.
"I would have concerns about how many doctors feel compelled to rely on medicated solutions to treating mental illness due to the lack of availability of other services such as counselling."