Cook-Waite Lidocaine HCL 2% with Epinephrine 1:100,000 Local Anesthetic, Box of 50 - 1.7 mL Cartridges. Cook-Waite Lidocaine HCl 2% is a local anesthetic agent that contains 20 mg/ml of lidocaine and epinephrine at 1:100,000 strength per injection for infiltrations and nerve blocks. For infiltration procedures, Cook-Waite Lidocaine HCl 2% activates in a maximum of two minutes, providing a numbing effect for approximately one hour.