two groups of patients who requested extradural analgesia were studied in a within-patient controlled trial and received either 0.5 % bupivacaine with adrenaline 5 mug/ml or 0.5 % bupivacaine plain as the analgesic agent ( first group ) or 0.5 % bupivacaine or 2 % lignocaine both with adrenaline 5 mug/ml ( second group ) .
C0359953
bupivacaine
C0006400
bupivacaine