SPL Set ID: eeadd641-573d-47fe-897a-61006e5f9e03

Pegfilgrastim-pbbk is a covalent conjugate of recombinant methionyl human G-CSF and monomethoxypolyethylene glycol. Recombinant methionyl human G-CSF is a water-soluble 175 amino acid protein with a molecular weight of approximately 19 kilodaltons (kD). Recombinant methionyl human G-CSF is obtained from the bacterial fermentation of a strain of E coli transformed with a genetically engineered plasmid containing the human G-CSF gene. To produce pegfilgrastim-pbbk, a 20 kD monomethoxypolyethylene glycol molecule is covalently bound to the N-terminal methionyl residue of recombinant methionyl human G-CSF. The average molecular weight of pegfilgrastim-pbbk is approximately 39 kD. Kanamycin is used during the manufacturing process but is undetectable in the final product. FYLNETRA (pegfilgrastim-pbbk) injection is supplied in 0.6 mL prefilled syringes for manual subcutaneous injection. The prefilled syringe does not bear graduation marks and is designed to deliver the entire contents of the syringe (6 mg/0.6 mL). The delivered 0.6 mL dose from the prefilled syringe contains 6 mg pegfilgrastim-pbbk (based on protein weight) in a sterile, clear, colorless to slightly yellow, preservative-free solution (pH 4.0) containing acetic acid (0.36 mg), polysorbate 20 (0.02 mg), sodium hydroxide (0.03 mg), and sorbitol (30 mg) in Water for Injection, USP.