The present invention is related to a pharmaceutical composition for erection. The pharmaceutical composition includes an effective amount of (-)-Epigallocatechin gallate (ECGC) and a peptide.本發明係關於一種用於幫助勃起的醫藥組合物。該醫藥組合物包含:有效劑量之一表沒食子兒茶素-3-沒食子酸酯((-)-Epigallocatechin gallate,ECGC);及一蛋白。