Lantus is an insulin glargine solution for injection at 100 U/mL (rDNA origin). Offered in a 10 mL vial and a box of five 3 mL vials, it is intended for subcutaneous administration as directed by a healthcare professional. Non-medicinal ingredients include glycerol 85%, m-cresol, zinc, and water for injection; the 10 mL vial also contains polysorbate 20. Hydrochloric acid and sodium hydroxide are used for pH adjustment. DINs: 02245689 (10 mL) and 02251930 (3 mL vials).