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N Nervous system Sistema nervioso 神经系统 神經系統 L1

Source: Editorial translation · editorial (project) Fuente: Traducción editorial · editorial (proyecto) 来源：编辑译名 · 编辑整理（项目） 來源：編輯譯名 · 編輯整理（專案）

ATC level L1 · Search this class · Consumer categories

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Active ingredients in this class

567 active ingredients 567 principios activos 567 个活性成分 567 個有效成分

The market codes after a status are the markets where that status is recorded (same codes as the product tables). An ingredient can be on sale in one market and withdrawn in another; that is a record fact, not a safety judgement.

Show all 567 (currently showing 80) Mostrar los 567 (ahora se muestran 80) 显示全部 567 个（当前显示前 80 个） 顯示全部 567 個（目前顯示前 80 個）
Class names are editorial translations or come from Wikipedia (CC BY-SA 4.0) / Wikidata (CC0); each ATC page lists the exact source, licence and link for every language. Only the ATC code and the WHO hierarchy are authoritative.
Notes & licences
Status badges summarise the product records held for each ingredient (active / discontinued / withdrawn / unknown), and the market codes after each badge show where that status is recorded. Only some registers publish a status column: CA, ES and MX do; AU and HK have no status column and are recorded as unknown; CN, US, GB, TW and SG records are on the register and marked active.
Class and category names are editorial or AI-assisted translations; only the ATC code and the WHO hierarchy are authoritative.
ATC codes and hierarchy reference the WHO Collaborating Centre for Drug Statistics Methodology ATC/DDD Index (copyright WHOCC; the index itself is not reproduced). Ingredient/strength facts come from the regulator records listed on About.