what do neuromuscular blocking agents do
â¢ NEUROMUSCULAR BLOCKING AGENT (noun). The noun NEUROMUSCULAR BLOCKING AGENT has 1 sense: 1. a substance that interferes with the neural transmission between motor neurons and skeletal muscles. Familiarity information: NEUROMUSCULAR BLOCKING AGENT used as a noun is very rare.laxedil; gallamine (neuromuscular blocking agent (trade name Flaxedil) used as a muscle relaxant in the administration of anesthesia). curare; tubocurarine (a toxic alkaloid found in certain tropical South American trees that is a powerful relaxant for striated muscles).