15 Unexpected Twists Your Body Takes With Diuretics
9. Changes In Blood Sugar Levels

Some diuretics—especially thiazides—can cause mild increases in blood glucose levels. This is of particular concern in patients with diabetes or those at risk of developing it. Doctors often monitor blood sugar more closely in patients who are starting a diuretic or adjusting their dose. In most cases, lifestyle changes or medications can stabilize glucose fluctuations. Patients should report any new symptoms such as increased thirst, frequent urination, or fatigue, which may indicate elevated blood sugar.
10. Hearing Problems (Ototoxicity)

Loop diuretics like furosemide (Lasix) may cause temporary or, in rare cases, permanent hearing loss—especially when given in high doses or used with other ototoxic drugs. Symptoms include ringing in the ears (tinnitus), muffled hearing, or sudden hearing changes. If any of these symptoms occur, patients should contact their doctor immediately. Regular hearing checks may be necessary for those on long-term high-dose therapy. Using the lowest effective dose and avoiding other ototoxic drugs may help reduce the risk.
