“…Atracurium's metabolite, laudanosine, a metabolite of atracurium with neuroexcitatory properties, may rarely cause seizures, especially in patients with hepatic and/or renal failure after prolonged administration. 94 Cisatracurium is the R-cis R'-CIS isomer of atracurium. Unlike atracurium, cisatracurium does not cause histamine release, and its metabolism results in one fifth of plasma concentration of laudanosine, when compared with atracurium.…”