MedicalPrescriptions

hi, we are planning to arrive in to the Arboleas area in August, At present we are looking into private health insurance that we will need, as we  are below retirement age and not entitled to S1. Which ever private insurance company we used will not cover for our existing conditions. As   we  require prescription tablets how do we go about obtaining these. Can we pay a local doctor for them, if so at what cost. Or can we buy them over the counter at a pharmacy. Any help would be appreciated. Tablets required are Losartan, Clopidogrel, amlodipine and betmiga.                Also require an injection of Nebido. We will hopefully arrive with 6 months supply from our GP, but plan to remain in Spain and would defiantly need these prescriptions long term.