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Lasix 40mg Tablet
Last updated on 11 Apr 2026 | 06:30 AM (IST)
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Introduction to Lasix 40mg Tablet
Lasix 40mg tablet contains an active ingredient called Furosemide which belongs to the medication class known as diuretics. It is used to treat edema (excessive water accumulation) and high blood pressure. Edema can be caused by various underlying issues such as heart, lung, kidney, or liver problems. This helps the kidneys to remove excess water, which is not needed by the body.
Lasix 40mg tablet should not be taken if you are allergic to Furosemide or other sulphonamide-related medicines or any of the ingredients in the medication. Also, do not consume if you have anuria, impaired kidney function or kidney failure, severe kidney damage, very low levels of potassium, sodium, or other electrolytes, dehydration, low blood pressure, take potassium supplements or potassium-sparing diuretics, have liver cirrhosis or liver encephalopathy, suffer from Addison's disease, have digitalis poisoning, or if you are breastfeeding.
Before starting the treatment with Lasix 40mg tablet, notify your doctor if you have hypovolaemia (low blood volume) or risk of low blood pressure, hypoproteinaemia (low levels of blood protein) due to kidney damage, liver congestion or other liver problems, kidney problems, diabetes or insulin use, advanced age or medications that lower blood pressure, prostate issues or difficulty in urinating, history of gout or abnormal blood condition, and upcoming blood or urine tests.
Uses of Lasix 40mg Tablet
Treats hypertension (high blood pressure)
Treatment of edema (fluid accumulation)
Therapeutic Effects of Lasix 40mg Tablet
Lasix 40mg tablet acts by blocking the reabsorption of sodium, chloride, and water in the kidneys, mainly in the ascending limb of the loop of Henle. This inhibition increases urine production, eliminating excess fluid from the body and reducing fluid retention. Ultimately, this diuretic effect helps lower blood pressure.
Interaction of Lasix 40mg Tablet with other drugs
Inform your doctor about any prescribed medications, over-the-counter medicines, nutritional or vitamin supplements, and herbal products you take or have taken before the treatment. Certain medications may interact with Lasix 40mg tablet and can cause undesirable side effects.
More Information about Lasix 40mg Tablet
- Keep out of sight and reach of pets and children.
- Do not freeze the medicine.
- Do not store above 25°C.
- Always check the expiry date before consuming it.
How to consume Lasix 40mg Tablet
Take the Lasix 40mg tablet as your physician advises. Usually, the tablets will be taken with a glass of water. Do not crush, chew, or open the medicine. Your physician will decide the correct dosage and duration based on age, body weight, and disease condition. Only stop taking the tablet if your doctor advises you to stop.
Safety Advice for Lasix 40mg Tablet
Breast Feeding
Do not take Lasix 40mg tablet while breastfeeding. Inform your doctor if you are breastfeeding. Therefore, talk with your doctor to get more information.
Alcohol
It is unsafe to consume alcohol while taking Lasix 40mg tablet. Please speak with your physician.
Liver
Lasix 40mg tablet should be used cautiously in liver patients. Before starting the treatment, inform your physician about pre-existing liver conditions.
Lungs
It is unknown whether Lasix 40mg tablet is safe for patients with lung problems. Notify your physician if you have any lung disease before starting the treatment. Contact your doctor if you experience any lung-related symptoms.
Driving
Lasix 40mg tablet could alter the driving ability or operating machinery capacity by causing dizziness, headaches, nausea, and tiredness.
Pregnancy
Limited information is available on the use of Lasix 40mg tablet during pregnancy. Notify your healthcare professional if you are pregnant or planning to have a baby think you may be pregnant.
Side Effects of Lasix 40mg Tablet
Side effects are unwanted symptoms caused by medicines. Even though all medicines cause side effects, not everyone gets them.
Serious
- Severe allergic reaction (skin rash, itching, dermatitis, peeling skin)
- Sensitivity to sunlight or sun lamps
- Swelling of the face, lips, tongue, or throat
- Difficulty breathing
- Fever
- Stevens-Johnson syndrome
- Inflammation of blood vessels or kidney
- Blood clot
Common
- Low blood volume (hypovolaemia)
- Increased creatinine and blood urea
- Dehydration
- Frequent urination
- Muscle cramps
- Loss of appetite
- Heart rhythm changes
- Stomach discomfort
- Weakness, dizziness, confusion
- High cholesterol levels
- Diarrhea
- Constipation
- Nausea, vomiting
- Headache, blurred vision
Word of Advice
Liver and kidney patients should take Lasix 40mg tablet cautiously and inform their doctor about all the underlying medical conditions. Do not stop the medicine until your doctor advises. Do not double-dose the medicine to make up for a forgotten dose. Your physician will regularly conduct blood tests to monitor your electrolyte, mineral, and glucose levels in your blood.
Do not breastfeed while taking Lasix 40mg tablet. Notify your doctor if you experience any serious side effects. Your medical professional will inform you if you need any dose adjustments. Contact your doctor for more information.
FAQs about Lasix 40mg Tablet
Q1.
How to manage the side effects of Lasix 40mg tablet?
To manage the side effects of Lasix 40mg tablet, follow the prescribed dosage, and report side effects promptly. Stay hydrated, and monitor blood pressure regularly. Maintain a healthy lifestyle, and attend follow-up appointments.
Q2.
Can Lasix 40mg tablet interact with other medications?
Yes, Lasix 40mg tablet can interact with other medicine and can cause undesirable side effects. Inform your doctor about any prescribed medications, over-the-counter medicines, nutritional or vitamin supplements, and herbal products you take or have taken before the treatment.
Q3.
What are the common side effects of Lasix 40mg tablet?
Common side effects of Lasix 40mg tablet may include frequent urination, dizziness, headaches, muscle cramps, or low potassium levels. It's mandatory to note that not everyone will experience these side effects.
Q4.
Is it safe to use Lasix 40mg tablet if I am pregnant?
Limited information is available on the use of Lasix 40mg tablet during pregnancy. Notify your healthcare professional if you are pregnant or planning to have a baby think you may be pregnant. Report to your medical professional if you are pregnant, think you may be pregnant, or planning for the pregnancy before starting the treatment.
Q5.
What should I do if I miss a dose of Lasix 40mg tablet?
If you miss a dose of Lasix 40mg tablet, take it as soon as possible. However, if it's close to the time for your next dose, skip the missed dose and continue with your regular schedule. Do not double the dose.
Fact Box of Lasix 40mg Tablet
| Molecule Name: Furosemide | Therapeutic class: Heart disorder |
Pharmacological class: Diuretics
| Indications: 1. Treats hypertension (high blood pressure) 2. Treatment of edema (fluid accumulation) |
References
- Bertram G. Katzung, Drugs Used in Heart Failure, Lange’s Basic and Clinical Pharmacology, 14th Edition, 2018, 212-227.
- Elara Pharmaservices Limited, Electronic Medicines Compendium (EMC), [Revised on October 2020] [Accessed on 31st May 2023], PARTICULARS TO APPEAR ON THE OUTER PACKAGING (medicines.org.uk)
- West-Ward Pharmaceuticals Corp, Food and Drug Administration, [Revised on Jul 2017] [Accessed on 31st May 2023], https://www.accessdata.fda.gov/drugsatfda_docs/label/2017/018823s044lbl.pdf
Disclaimer
MrMed’s primary intention is to ensure that its consumers get information that is reviewed by experts, accurate and trustworthy. The information and contents of this website are for informational purposes only. They are not intended to be a substitute for professional medical advice, diagnosis, or treatment. Please seek the advice of your doctor and discuss all your queries related to any disease or medicine. Do not disregard professional medical advice or delay in seeking it because of something you have read on MrMed. Our mission is to support, not replace, the doctor-patient relationship.
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Author Details
Written By
Aswini Priya Velmurugan
PG in Biotechnology
Reviewed By
Dr. Tejashwin Adiga
MBBS
Last updated : 11 Apr 2026 | 06:30 AM (IST)
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