Romiplostim Injection 1 ml belongs to the class of 'platelet-stimulating agents' primarily used to treat chronic immune thrombocytopenia in adults who have had an insufficient response to corticosteroids, immunoglobulins, or splenectomy. Immune thrombocytopenia, often called idiopathic thrombocytopenic purpura (ITP), is an immune disorder characterised by low platelet counts.