[Problems to be Solved] An objective of the present invention is to provide more effective and safer dosages and administrations of anti-C5 antibody for use in the treatment and/or prevention of C5-related diseases, which can also reduce burden on patients.[Means for Solving the Problems] The present invention provides pharmaceutical compositions for use in the treatment or prevention of a C5-related disease, methods for treating or preventing a C5-related disease, dosages and administrations of anti-C5 antibody or pharmaceutical compositions containing the anti-C5 antibody.[欲解決的問題] 本發明的目的係提供用於治療及/或預防C5相關疾病的抗C5抗體之更有效且更安全的劑量及施用,其也可降低患者的負擔。[解決問題的手段] 本發明提供用於治療或預防C5相關疾病的醫藥組合物、用於治療或預防C5相關疾病的方法、抗C5抗體或包含抗C5抗體的醫藥組合物的劑量及施用。