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Prescription requiredEmcure PharmaCardiac / Antihypertensive

Lasix 40 Tablet

Frusemide (40mg)

Lasix 40 Tablet is used for lasix 40 mg Tablet is used in the treatment of oedema and high blood pressure. It treats oedema (fluid overload) associated with heart, liver, kidney or lung disease.

Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated September 2026

₹14₹0.96 per tablet
Licensed pharmacyPharmacist-verified orderDelivered across India

Key details

Salt: Frusemide (40mg)
Available variants: tablet 15 Tablet
Best price: ₹14 (₹0.96 per tablet)
Prescription: Required
Manufacturer: EMCURE PHARMA

Ordering notes

Standard delivery across India. No same-day delivery nationally.
Chennai express delivery is possible and chargeable. Learn more
Returns & refunds: orders can be cancelled before dispatch; after dispatch, returns depend on the item category. Read the full policy

Composition of Lasix 40 Tablet

Lasix 40 Tablet contains Frusemide (40mg). It belongs to the Water tablet class of medicines.

Uses of Lasix 40 Tablet

  • Lasix 40 mg Tablet is used in the treatment of oedema and high blood pressure. It treats oedema (fluid overload) associated with heart
  • liver
  • kidney or lung disease.

Key benefits

  • Relieves swelling and breathlessness caused by fluid
  • Long-established blood pressure treatment
  • Inexpensive and once daily

How Lasix 40 Tablet works

Lasix 40 mg Tablet is a diuretic. It removes extra water and certain electrolytes from the body by increasing the amount of urine produced. In doing so, it causes potassium loss.

How to take Lasix 40 Tablet

Take this medicine in the dose and duration as advised by your doctor. Swallow it as a whole. Do not chew, crush or break it. Lasix 40 mg Tablet may be taken with or without food, but it is better to take it at a fixed time.

Take it exactly as your doctor prescribed. Do not change the dose or stop early on your own.

Missed dose and overdose

If you miss a dose

Take it as soon as you remember. If your next dose is almost due, skip the one you missed — never take two doses together to catch up.

If you take too much

An overdose of this medicine can cause severe dehydration, a sharp fall in blood pressure and dangerous salt imbalances. Do not wait for symptoms to appear — go to the nearest emergency department and take the pack or strip with you.

Side effects of Lasix 40 Tablet

Most side effects of Lasix are mild and settle as the body adjusts. Reported side effects include:

  • Dizziness Weakness Dehydration Decreased potassium level in blood Increased blood uric acid Decreased magnesium level in blood Increased thirst

Stop the medicine and seek help immediately for a rash, swelling of the face or lips, wheezing or difficulty breathing. Tell your doctor about any side effect that persists or worries you.

Safety advice for Lasix 40 Tablet

PregnancyLasix 40 mg Tablet may be unsafe to use during pregnancy.<br/>Animal studies have shown adverse effects on the foetus, however, there are limited human studies. The benefits from use in pregnant women may be acceptable despite the risk. Please consult your doctor.
BreastfeedingLasix 40 mg Tablet is probably safe to use during lactation. Limited human data suggests that the drug does not represent a significant risk to the baby.
AlcoholTaking Furosemide with alcohol may have additive effects in lowering your blood pressure. You may experience headache, dizziness, lightheadedness, fainting, and/or changes in pulse or heart rate.
DrivingMay cause drowsiness or affect your concentration. Do not drive until you know how it affects you.
KidneyLasix 40 mg Tablet is safe to use in patients with kidney disease. No dose adjustment of Lasix 40 mg Tablet is recommended.<br/>However, use of Lasix 40 mg Tablet is not recommended in severe kidney disease patients who are unable to pass urine or the kidney damage is due to some medicines. Please inform your doctor.
LiverLasix 40 mg Tablet should be used with caution in patients with liver disease. Dose adjustment of Lasix 40 mg Tablet may be needed. Please consult your doctor.
Habit formingNo

Warnings and precautions

Take it in the morning so that passing urine does not disturb your sleep. Your doctor will check your salts and kidney function with blood tests — do not skip them. Report muscle cramps, marked weakness, confusion or an irregular heartbeat; these can be signs your potassium or sodium has fallen. In hot weather or during an illness with vomiting or loose motions, tell your doctor — you may become dehydrated quickly.

Do not take Lasix if

Not for anyone with a known allergy to this medicine or to any ingredient in the pack. Not for people who are unable to pass urine, or who are severely dehydrated.

Interactions with other medicines

Anti-inflammatory painkillers blunt the effect and can strain the kidneys. Lithium and digoxin levels are affected; tell your doctor if you take either. Potassium-sparing types must not be combined with potassium supplements without supervision.

How to store Lasix 40 Tablet

Store below 30°C in the original pack, away from direct sunlight and moisture. Keep out of the reach of children.

Expert advice for Lasix 40 Tablet

<div class="style__desktop-container___1hcBT"><div class="style__desktop-video___2GTR9"><div class="styles__video-img___1rCzR"><div class=""/><div class=""/></div></div><div><div><div><div><div class="ExpertAdviceItem__content___1Djk2"><ul><li>Lasix 40 mg Tablet helps remove excess water from your body and lowers blood pressure.</li> <li><div>Take it in the morning with breakfast to avoid getting up at night to urinate.</div></li> <li><div>May cause dizziness in the initial days of treatment.</div></li> <li><div>Monitor your blood pressure after starting Lasix 40 mg Tablet, and notify your doctor if it does not lower down.</div></li> <li>Notify your doctor if you experience dizziness, tiredness, or muscle weakness that does not go away.</li> <li>Take potassium supplements or potassium-rich diet (banana, spinach, coconut water, etc.) as Lasix 40 mg Tablet can decrease your potassium levels and lead to dehydration.</li> <li>You may be asked to get regular blood tests done to monitor your kidney function.</li></ul></div></div></div></div></div></div>

Manufacturer and class

Manufacturer:
EMCURE PHARMA
Therapeutic class:
Cardiac / Antihypertensive
Drug class:
Water tablet

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Lasix 40 Tablet FAQs

What is Lasix 40 Tablet used for?
Lasix 40 Tablet is commonly used for Lasix 40 mg Tablet is used in the treatment of oedema and high blood pressure. It treats oedema (fluid overload) associated with heart, liver, kidney or lung disease. Always follow your doctor's advice, this information is for educational purposes and not a substitute for professional medical guidance.
What is the salt in Lasix 40 Tablet?
Lasix 40 Tablet contains Frusemide (40mg). If you are allergic to any of these active ingredients or excipients, do not take this medicine and speak to your doctor first.
How should I take Lasix 40 Tablet?
Take this medicine in the dose and duration as advised by your doctor. Take it exactly as prescribed; do not change the dose or stop early without talking to your doctor.
How does Lasix 40 Tablet work?
Lasix 40 mg Tablet is a diuretic.
Is Lasix 40 Tablet a prescription medicine?
Yes. Lasix 40 Tablet is a prescription-only (Rx) medicine. Upload a valid prescription from a registered medical practitioner during checkout. We cannot dispense it without a valid Rx.
What are the common side effects of Lasix 40 Tablet?
The side effects reported most often with Lasix are Dizziness Weakness Dehydration Decreased potassium level in blood Increased blood uric acid Decreased magnesium level in blood Increased thirst. Most are mild and settle as the body adjusts; tell your doctor if any of them persist or worry you, and stop the medicine and seek help at once for a rash, swelling of the face or lips, or difficulty breathing.
Can Lasix 40 Tablet be taken during pregnancy?
Lasix 40 mg Tablet may be unsafe to use during pregnancy.<br/>Animal studies have shown adverse effects on the foetus, however, there are limited human studies. Always tell your doctor if you are pregnant, planning a pregnancy or breastfeeding before starting Lasix.
Can I drink alcohol while taking Lasix 40 Tablet?
Taking Furosemide with alcohol may have additive effects in lowering your blood pressure.
What if I miss a dose of Lasix 40 Tablet?
Take it as soon as you remember.
Is Lasix 40 Tablet habit forming?
No. Lasix 40 Tablet is not known to be habit forming when taken as prescribed.
How much does Lasix 40 Tablet cost on PingMeDoc Pharmacy?
Lasix 40 Tablet starts at ₹14 on PingMeDoc Pharmacy. Available in tablet 15 Tablet. Final price is confirmed at checkout and may vary by variant and location.
Who manufactures Lasix 40 Tablet?
Lasix 40 Tablet is manufactured by EMCURE PHARMA. PingMeDoc Pharmacy sources medicines only from licensed manufacturers and distributors.
How is Lasix 40 Tablet delivered?
Lasix 40 Tablet is delivered across India via our licensed pharmacy partners. Standard delivery timelines are confirmed at checkout. Chennai customers can opt for chargeable same-city express delivery.

Lasix 40 Tablet, Quick facts

Salt
Frusemide (40mg)
Form
tablet
Best price
₹14 (₹0.96 per tablet)
Prescription
Required (Rx)
Schedule
Schedule H
Brand
EMCURE PHARMA
Manufacturer
EMCURE PHARMA
Therapeutic class
Cardiac / Antihypertensive
Drug class
Water tablet
Habit forming
No
Variants
tablet 15 Tablet
Delivery
Standard across India

References

The information on Lasix 40 Tablet is compiled from the manufacturer's prescribing information and the sources below, and is reviewed by a registered medical practitioner. It does not replace advice from your own doctor.

  1. PingMeDoc clinical monograph library — compiled from Indian package inserts, the Indian Pharmacopoeia
  2. CDSCO schedules and standard pharmacology references. Reviewed for patient readability. This is general information, not a substitute for your doctor's advice.
  3. Central Drugs Standard Control Organisation (CDSCO), Ministry of Health & Family Welfare, Government of India, approved drug and schedule listings.
  4. National List of Essential Medicines (NLEM) 2022, Government of India.
  5. Manufacturer's package insert / prescribing information for Lasix 40 Tablet.
  6. World Health Organization, ATC/DDD classification and Model Formulary for the active ingredient.

Next steps

Safety disclaimer

Product information is for general awareness and does not replace professional medical advice. Always follow a clinician's guidance and upload a valid prescription when required.