An individual or family in Ireland only has to pay a maximum of €132 (as of Budget 2012) for approved prescribed drugs, medicines and certain appliances for use by that person or household per month. This can include gluten free food if you are a diagnosed coeliac. The threshold may increase or decrease so keep an eye on the Budget.
Once you spend €132 on prescriptions in the pharmacy, further prescriptions are free of charge. Your GP can prescribe items from the General Medical Services Scheme (GMS List) including bread, rolls, bread mixes and flour, pasta, breakfast cereals, pizza bases and baking powder.