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Demadex Side Effects

Generic name: torsemide

Medically reviewed by Last updated on Aug 15, 2023.

Note: This document contains side effect information about torsemide. Some dosage forms listed on this page may not apply to the brand name Demadex.

Applies to torsemide: oral tablet.

Serious side effects of Demadex

Along with its needed effects, torsemide (the active ingredient contained in Demadex) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking torsemide:

Less common


Incidence not known

Get emergency help immediately if any of the following symptoms of overdose occur while taking torsemide:

Symptoms of overdose

Other side effects of Demadex

Some side effects of torsemide may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

Less common

For Healthcare Professionals

Applies to torsemide: injectable solution, oral tablet.


The most common adverse reactions were headache and excessive urination.[Ref]


Common (1% to 10%): Edema

Frequency not reported: Hyperglycemia, hyperuricemia, hypokalemia, hypovolemia, excessive thirst, gout, calcium excretion increased, serum calcium increased, serum calcium decreased, magnesium excretion increased, serum magnesium increased, serum magnesium decreased, BUN increased, creatinine increased, uric acid increased, serum glucose increased, total plasma cholesterol increased, plasma triglycerides increased[Ref]


Common (1% to 10%): Diarrhea, constipation, nausea, dyspepsia, sore throat

Frequency not reported: Vomiting, esophageal hemorrhage, gastrointestinal hemorrhage, rectal bleeding, dry mouth

Postmarketing reports: Pancreatitis[Ref]

Nervous system

Common (1% to 10%): Headache, dizziness

Frequency not reported: Syncope, tinnitus, hearing loss, limb paresthesia[Ref]


Common (1% to 10%): Asthenia, chest pain

Frequency not reported: Weakness, digitalis intoxication[Ref]


Common (1% to 10%): Arthralgia, myalgia

Frequency not reported: Arthritis[Ref]


Common (1% to 10%): Insomnia, nervousness[Ref]


Common (1% to 10%): Rhinitis, cough increased[Ref]


Common (1% to 10%): ECG abnormality

Frequency not reported: Atrial fibrillation, hypotension, shunt thrombosis, ventricular tachycardia[Ref]


Common (1% to 10%): Excessive urination

Frequency not reported: Impotence[Ref]


Frequency not reported: Red blood cells decreased, white blood cells decreased, platelets decreased, hemoglobin decreased, hematocrit decreased, erythrocyte count decreased, white blood cell count increased, platelet count increased, serum alkaline phosphatase increased

Postmarketing reports: Leukopenia, thrombocytopenia[Ref]


Frequency not reported: Rash, angioedema

Postmarketing reports: Stevens-Johnson syndrome, toxic epidermal necrolysis[Ref]


Frequency not reported: Visual disturbance[Ref]

Frequently asked questions


1. Product Information. Demadex (torsemide). Boehringer Mannheim. PROD.

2. Cerner Multum, Inc. UK Summary of Product Characteristics.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.