Quite all to least toxic sites IV>Intercostal>Caudal>Epidural>Interfascial plane blo-kes of the abdominal wall (TAP)> Psoas compartment>Sciatic blocks>Cervical plexus block>block brachia.
Most-to-Least toxic sites IV>Intercostal>Caudal>Epidural>Interfascial plane blocks of the abdominal wall (TAP)> Psoas compartment blocks>Sciatic blocks>Cervical plexus block>Brachial plexus block.