Prescription drug · Used for swelling and high blood pressure

Furosemide (Lasix) side effects

This side effect is printed on the FDA label for Furosemide. It was a question in our daily quiz, where you pick the real side effect from four choices.

Ringing in the ears or hearing loss

It's more likely with high doses, fast IV injections or kidney problems. Sometimes it's permanent.

From the FDA label

“Cases of tinnitus and reversible or irreversible hearing impairment and deafness have been reported.”

Furosemide label, updated Aug 17, 2026 · Read the full label on DailyMed

What to watch for

Tell your doctor about ringing in the ears or trouble hearing. Also report dizziness, muscle cramps or extreme thirst.

1,692 reports to the FDA's adverse event system mention ringing in the ears or deafness. A report is not proof the drug caused it. See the query

From quiz No. 17 · October 11, 2026 · Play that quiz →

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Not medical advice. Don't stop or start a medication because of a quiz. Talk to your doctor or pharmacist. Label text and report counts from openFDA. Not affiliated with any drug maker.