The powder is white.
Each vial contains 250 μg of romiplostim. After reconstitution, a deliverable volume of 0.5 mL solution contains 250 μg of romiplostim (500 μg/mL). An additional overfill is included in each vial to ensure that 250 μg of romiplostim can be delivered.
Romiplostim is produced by recombinant DNA technology in Escherichia coli (E. coli).
Excipients/Inactive Ingredients: Mannitol (E421), Sucrose, L-histidine, Hydrochloric acid (for pH adjustment), Polysorbate 20.