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What are the side effects of colistimethate injection?

Colistimethate commonly causes dizziness, a mild tingling in your extremities, upset stomach and diarrhea. If you notice these symptoms persisting or getting worse, call your doctor. You also should consult your doctor if you develop a fever, itching, nausea, muscle weakness, difficulty breathing or you urinate less frequently. Seek immediate medical attention if you have:

  • uncontrolled eye movements
  • bloody urine or stools
  • chest tightness or shortness of breath
  • loss of appetite
  • unusual fatigue
  • blue tones to the skin or lips 
  • become shaky while walking

If you have trouble breathing; swelling in the face, lips, tongue or neck; an itchy rash; or hives, you may be allergic to the medication and should get immediate medical assistance.