The 3rd edition of ECOInterviews, a scientific initiative promoted by the ECO Foundation, was developed under the title 'Analysis of the potential of biosimilars for sustainable oncology care'. The session included the intervention of Drs. Luis De la Cruz, head of the Medical Oncology Service at the Virgen Macarena Hospital (Seville), and Olga Delgado, head of the Hospital Pharmacy Service at the Son Espases Hospital (Palma de Mallorca) and president of the Spanish Society of Hospital Pharmacy (SEFH).