Answer
Yes. It can increase or prolong the effects of some muscle relaxants used during general anaesthesia.
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
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.