<prompt> All of the following statements about lignocaine are true exceptIt blocks active sodium channels with more affinity than resulting sodium channelsIt can cause cardiotoxicityIt is given orally for treatment of cardiac arhymiasAdrenaline increases the duration of action of lignocaine when used for infiltration anesthesia  <response>: All local anesthetics are weak bases.These drugs act by penetrating the axonal membrane and blocking the voltage gated sodium channels within Vasoconstrictors like adrenaline can prolong the duration of action. All LA can cause cardiotoxicity and neurotoxicity 