Lidocaine 2%, Lidocaine Injection Numbing Shot 20 mL Multi-Dose Vials Hospira Pfizer 25/tray (Rx) Expiration 2/28/27Lidocaine 2% Injection Multi Dose Lidocaine HCl 2% injection is an amide type local anesthetic. The 2% means 20 mg of lidocaine per mL of solution. It usually comes in sterile multi dose vials (e. g. 530 mL) that contain a small amount of preservative (methylparaben, ~0. 1%). Multi dose vials allow repeated withdrawals (with a new sterile needle each time), unlike single use ampoules. Because of the preservative, this formulation is not used for