In Portugal - which has a National Health Service - I'm getting 5 pens for €0 with a doctor's prescription (and there are mechanisms for just getting new prescriptions regularly or on request without needing to go for a doctor's appointment every time), as would anybody else that needs it, by the way, as it's not means tested.
That said, without said prescription it would be about €70 for 5 pens.
Also the local politicians are slowly but surely destroying the National Health Service in order to privatise Healthcare bit by bit.