R05FA: Opium derivatives and expectorants

R05FA Opium derivatives and expectorants is part of the WHO ATC classification system and belongs to R Respiratory system > R05 Cough and Cold Preparations > R05F Cough Suppressants and Expectorants, Combinations. This chemical subgroup page helps users identify more specific classifications and related active ingredients associated with this ATC code. It also includes 2 related active ingredients, supporting deeper navigation across ingredient-level pages. Use this page to explore the ATC hierarchy, review connected groups, and find relevant ingredient pages within Pharmassive.