The primary objective of this trial is to assess the pharmacokinetic similarity of EG12014 (Test IMP) compared to reference products sourced from the European Union (Reference IMP 1: Herceptin® 150 mg powder for concentrate for solution for infusion) and the United States (Reference IMP 2: Herceptin® 440 mg powder for concentrate for solution for infusion) after intravenous infusion over 90 minutes of a single dose of 6 mg/kg trastuzumab in 3 parallel groups of healthy male subjects.