3% Polocaine Dental Mepivacaine HCl injection, USP – 1.8 ml Cartridge, 50/Pkg3% Polocaine Dental Mepivacaine HCl injection without vasoconstrictor is a dental anesthetic agent offering reliable protection from pain for approximately 20 minutes in the maxilla and 40 minutes in the mandible. Average soft tissue duration of 2 to 3 hours in infiltration and 3 to 4 hours in the nerve blocks Cartridges features siliconized plungers, which allow for smooth movement and precise control Cartridges are packed in blister trays