Answer
Not exactly. Colistimethate sodium is a prodrug converted into the active antibiotic colistin.
Sources for this answer
- Colomycin (Colistimethate Sodium) 1 MIU Powder for Injection, Infusion or Inhalation — Current selected SmPCemc · Summary of Product Characteristics
- Promixin 1 million International Units (IU) Powder for Nebuliser Solution — Current selected SmPCemc · Summary of Product Characteristics
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