The Classification of Pharmaco-Therapeutic Referrals (CPR) is a taxonomy focused on defining and grouping together situations requiring a referral from pharmacists to physicians (and vice versa) regarding the pharmacotherapy used by the patients. It has been published in 2008. It is bilingual: English/Spanish (Clasificación de Derivaciones Fármaco-terapéuticas). It is a part of the MEDAFAR Project, whose objective is to improve, through different scientific activities, the coordination processes between physicians and pharmacists working in primary health care.