At the same time, just one in eight male prisoners were on methadone.
Over half of female prisoners are on methadone, which is normally used to treat an addiction to heroin.
There were 104 on the drug at the end of last year - out of 189 women in jail at the time.
According to freedom of information figures, only one in eight male prisoners were on methadone at the time.
Former governor of Mountjoy and Portlaoise Prisons, John Lonergan, is not surprised by the figures relating to women:
Michael O’Leary Rejects Rape Comment Criticism And Refuses To Apologise
The Ryanair CEO is under fire for comments he made yesterday.
Gardaí Investigating Graffiti Damage To Three Buildings In Laois
The incidents took place Wednesday morning.
Irish Business Leaders Unite With Rory Best For 378km Charity Challenge
The walk begins tomorrow.
Midlands MEP To Host Youth Policy Dialogue On Future Of Farming
Maria Walsh is calling for 10% of the future CAP budget to be allocated to generational renewal.
SETU Launches Collaboration With The All Ireland Institute Of Hospice And Palliative Care
The launch comes as part of Palliative Care Week.
Appeal Lodged Against Plans For 30 New Homes In Laois
An appeal was lodged to An Commisiun Pleanala.
€100k Funding Announced To Support Students At International STEM Events
Schools may apply up to €500 per student per event, increasing to €1,000 in exceptional circumstances.
Midlands MEP Calls For Major EU Housing Investment To Tackle Crisis
The EU will unveil its Affordable Housing Act this week.
