| M - Musculo-Skeletal System |  |   |  
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| M03 - Muscle Relaxants |  This group comprises peripherally, centrally and directly acting muscle relaxants. See also G04BD - Drugs for urinary frequency and incontinence. 
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| M03A - Muscle Relaxants, Peripherally Acting Agents |  This group comprises peripherally acting muscle relaxants such as curare alkaloids and suxamethonium. The drugs in this group are mainly used together with anesthetics. 
  |  As for other drugs used in general anesthesia (see N01A), no DDDs have been established in this group because the doses used vary substantially. 
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| M03AC - Other Quaternary Ammonium Compounds |  Sugammadex indicated for reversal of neuromuscular blockade induced by rocuronium or vecuronium is classified in V03AB - Antidotes. 
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| M03AC09 - Rocuronium Bromide |  
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