<prompt> Upper dose limit of lignocaine in a 70 kg adult is100 mg150 mg200 mg250 mg  <response>: Few common local anaesthetic drugs Name Maximum dose Comments Lignocaine 3 mgkg 7 mgkg with adrenaline Early onset, sho acting, good sensory block Bupivacaine 2 mgkg Long lasting, more cardio toxic, must never be used intravenously Prilocaine 6mgkg 9 mgkg with adrenaline Least systemic toxicity, causes methemoglobinemia Ropivacaine 3-4 mgkg Less cardio toxic, greater sensory-motor seperation Levobupivacaine 2mgkg Isomer of Bupivacaine with fewer cardio toxic propeies Ref: Bailey and love 27th edition Pgno : 273 