Atracurium besylate

Neuromuscular blocker for muscle paralysis; binds to cholinergic receptor sites to block neural transmission
Children:
<2 yr: 0.3–0.4 mg/kg as needed.
>2 yr–adults: 0.4–0.5 mg/kg, then 1 mg/kg 20–45 min after each initial block to maintain effect.
Continuous IV infusion: 0.4–0.8 mg/kg/hr.