<prompt> All are true about Bupivacain EXCEPTLess cardiotoxic than lignocaineDose increases with adrenalineLong actingCannot given in veins  <response>: Less cardiotoxic than lignocaine 391 Less 13th 357-KDT 6th 0.25 bupivacain or 0.5 lidocaine both with adranaline are suitable. The dose of bupivacain should not exceed 2mg kg 456 - Lees Bupivacaine causes more sensory than motor block It is not recommanded for intravenous regional analgesia because leakage post the tourniquet in to blood stream may cause toxic or even fatal complication The duration of effect is between 5 and 16 hours - it is one of the longest - acting local analgesics known Lignocaine - It is less toxic than bupivacain but cardiotoxic and CNS symptoms of poisoning may occur The new local anaesthetics levobupicaine and ropivacaine undoubtedly safer than bupivacaine, But case reports of convulsions and cardiac arrest are emerging 385 - Lees 13th 