Complex sentence: Pancuronium is a very potent muscle relaxant/curaremimetic, the ED95 (i.e. a dose causing a 95% reduction in muscle activity) being only 60 µg/kg body weight administered intravenously.
Split into simpler sentences: Pancuronium is a very potent muscle relaxant/curaremimetic. The ED95 (i.e. a dose causing a 95% reduction in muscle activity) is only 60 µg/kg body weight administered intravenously.