What are the possible side effects of furosemide?

Based on information from iGuard.org, a free medication monitoring service, 29% of patients experience side effects while taking Furosemide (Lasix). Some of the side effects reported by iGuard members include:
  • Urinary Frequency
  • Dryness 
  • Muscle Pain/Cramps
  • Dizziness
  • Fatigue 
  • Electrolyte Problems. 
Please follow up with your doctor or other healthcare provider if you are experiencing any symptoms that worsen or do not go away.
The diuretic furosemide (Lasix) has a number of side effects, including:
  • gastrointestinal side effects such as
  • pancreatitis (an inflammation of the pancreas), jaundice (yellowing of the skin and eyes caused by liver problems), weight loss, diarrhea, constipation, nausea and vomiting
  • general body system side effects such as systemic vasculitis, a form of inflammation of the blood vessels
  • a burning or prickling feeling in the extremities, vertigo, dizziness, blurred vision, headache and a condition called xanthopsia that affects the way you see colors
  • high blood sugar
Call your doctor immediately if you develop any of these side effects: sore throat, ringing in your ears, unusual bleeding or bruising, fever, loss of hearing, severe rash with peeling skin, difficulty breathing or swallowing or rapid and excessive weight loss.