缺鐵性貧血是門診常見的疾病，長期鐵劑補充是這類患者的主要治療方式之一。鐵劑的形式以口服的劑型較為常見，也因為方便使用，通常是臨床醫師第一線的選擇。而靜脈注射型的鐵劑則通常是在口服劑型的補充效果未達預期，或是病人有嚴重腸胃道副作用時的另外一種選擇，然而鐵過量時可能對人體造成毒性甚至致命。有關鐵劑中毒之文獻不多，其中以兒科個案以及口服劑型的報導為主，本案例為罕見因注射鐵劑過量，以嘔吐及血壓降低為表現的中毒個案，希望藉由探討鐵中毒的機轉、臨床表徵、及治療方法，讓第一線醫師對鐵劑中毒有更多認識，能及時辨識出病人，選擇適當的治療方式並在必要時進行轉診。

Iron-deficiency anemia is a common medical condition in everyday clinical practice. Oral or parenteral iron therapy is essential in treating patients with chronic iron-deficiency anemia. However, excess iron can be toxic and even fatal to human body. This article reports a case of iron intoxication presented with vomiting and hypotension due to wrong dosage of parenteral iron infusion with the purpose of reminding primary care physicians to understand the pathophysiology and clinical manifestations of iron intoxication so as to facilitate timely recognition, proper management, and necessary referral.