Neostigmine Omega is a prescription solution for injection containing neostigmine methylsulfate 2.5 mg/mL in convenient multidose vials. Each mL includes phenol 0.45% with a buffered system of sodium acetate, acetic acid, and sodium hydroxide in water for injection. Labeled routes of administration include intramuscular, intravenous, and subcutaneous use. Packaged as 10 vials of 5 mL per box and identified by DIN 02387166.