Hi Rita & Nen,
I think this is a new charge recently brought in by the Spanish Government.
http://www.telegraph.co.uk/finance/financialcrisis/9214928/Spain-tells-pensioners-to-start-paying-for-prescriptions-as-part-of-Prime-Minister-Mariano-Rajoys-austerity-measures.html

I have also heard that maybe the Catalan Government already have or will be applying an extra charge here. 
:(