Lostar 25mg Tablet

Reviewed By Dr. Sachin Gupta, MD Pharmacology, MBBS

Last updated on 25 Nov 2025 | 03:05 PM (IST)

Lostar 25mg Tablet is a medicine used to treat high blood pressure and heart failure. Lowering blood pressure helps prevent future heart attacks and strokes. This medicine is also effective in preserving kidney function in patients with diabetes.

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Lostar 25mg Tablet

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Same composition

COsart 25 Tablet

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Losartan (25mg)

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General Information

Contains

Losartan (25mg)

Marketer

Minova Life Sciences Pvt Ltd

Storage

Store below 30°C

The content is shown in English

Product introduction

Lostar 25mg Tablet can be prescribed either alone or in combination with other medicines. It may be taken with or without food during the day or at night. However, try to take it at the same time each day to get the most benefit. It is important to continue taking it regularly even if you feel well or if your blood pressure is controlled. Most people with high blood pressure do not feel ill, but if you stop taking this medicine, your condition could get worse. This is a widely used medicine and is considered safe for long-term use.

Making some changes in your lifestyle will also help lower your blood pressure. These may include regular exercise, losing weight, smoking cessation, reducing alcohol intake, and reducing the amount of salt in your diet as advised by your doctor. This medicine is tolerated well by most patients and has few side effects. Dizziness, particularly after the first dose, is known to occur in some people. This may be associated with headaches. Let your doctor know if these side effects bother you or do not go away.

Before taking this medicine, let your doctor know if you have any kidney or liver problems. Pregnant or breastfeeding women should also consult their doctor before taking it. Your doctor may check your kidney function, blood pressure, and potassium levels in your blood at regular intervals while you are taking this medicine.

Uses of Lostar Tablet

Hypertension (high blood pressure)
Heart Failure
Prevention of heart attack and stroke

Benefits of Lostar Tablet

Hypertension (high blood pressure)
Hypertension (high blood pressure) is a condition where the force of blood against the artery walls stays consistently high, increasing the risk of heart, brain, and kidney problems. Lostar 25mg Tablet helps lower and stabilize blood pressure, easing the strain on the heart and blood vessels. It supports better circulation and helps individuals feel more energetic and protected from long-term complications.

Heart Failure
Heart failure is a condition where the heart can't pump blood effectively, leading to tiredness, shortness of breath, and swelling in the legs.Lostar 25mg Tablet improves heart function and reduces the symptoms that limit daily activity. It supports better heart performance, improves comfort, and helps individuals live more actively and with greater stability.

Prevention of heart attack and stroke
Prevention of heart attack and stroke is important for people with heart disease, high blood pressure, or diabetes. Lostar 25mg Tablet protects the heart and brain by improving blood flow and lowering pressure in the arteries. It reduces the risk of life-threatening events and supports long-term cardiovascular health and peace of mind.

Side effects of Lostar Tablet

Most side effects do not require any medical attention and disappear as your body adjusts to the medicine. Consult your doctor if they persist or if you’re worried about them

Common side effects of Lostar

Dizziness
Decreased blood pressure
Hypoglycemia (low blood glucose level)
Increased potassium level in blood
Increased blood urea

How to use Lostar 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. Lostar 25mg Tablet may be taken with or without food.

How Lostar Tablet works

Lostar 25mg Tablet is an angiotensin receptor blocker (ARB). It relaxes the blood vessels by blocking the action of a chemical that usually makes blood vessels tighter. This lowers the blood pressure, allowing the blood to flow more smoothly to different organs and the heart to pump more efficiently.

All substitutes for Lostar 25mg Tablet

For information purposes only. Consult a doctor before taking any medicine.

Quick tips

Take it at the same time every day to help you remember to take it.
It can make you feel dizzy for the first few days. Rise slowly if you have been sitting or lying down for a long time.
Your doctor may get regular tests done to monitor the level of urea, creatinine, and potassium in your blood.
Avoid taking anti-inflammatory medicines such as ibuprofen along with this medicine without consulting your doctor.
Do not stop taking it suddenly without talking to your doctor.
Do not take Lostar 25mg Tablet during pregnancy. Tell your doctor if you conceive while taking Lostar 25mg Tablet.
Take it at the same time every day to help you remember to take it.
It can make you feel dizzy for the first few days. Rise slowly if you have been sitting or lying down for a long time.
Your doctor may get regular tests done to monitor the level of urea, creatinine, and potassium in your blood.
Avoid taking anti-inflammatory medicines such as ibuprofen along with this medicine without consulting your doctor.
Do not take Lostar 25mg Tablet if you are pregnant or breastfeeding.
Do not stop taking it suddenly without talking to your doctor.

Safety advice

Alcohol

UNSAFE

It is unsafe to consume alcohol with Lostar 25mg Tablet

Pregnancy

UNSAFE

Lostar 25mg Tablet is highly unsafe during pregnancy. It can cause serious harm to the unborn baby, including birth defects and pregnancy loss. Do not use this medicine if you are pregnant or planning to become pregnant.

Breast feeding

SAFE IF PRESCRIBED

Lostar 25mg Tablet may be safe to use during breastfeeding. Animal studies have shown low or no adverse effects to the developing baby; however, there are limited human studies.

Driving

CONSULT YOUR DOCTOR

It is not known whether Lostar 25mg Tablet alters the ability to drive. Do not drive if you experience any symptoms that affect your ability to concentrate and react. Please consult your doctor.

Kidney

SAFE IF PRESCRIBED

Lostar 25mg Tablet is safe to use in patients with kidney disease. No dose adjustment is recommended.
However, talk to your doctor if you have any underlying kidney disease. Regular monitoring of blood pressure is recommended for better dose adjustment.

Liver

CAUTION

Lostar 25mg Tablet should be used with caution in patients with liver disease. Dose adjustment may be needed.
Use of Lostar 25mg Tablet is not recommended in patients with severe liver disease.

Interaction with drugs

Taking Lostar with any of the following medicines can modify the effect of either of them and cause some undesirable side effects

Severe

Amiloride (Oral Route)

Do not consume Losartan with Amiloride if you have kidney disorders. If concurrent use is essential, your doctor may monitor your potassium levels closely. and adjust the dose of Amiloride as per the observations.

Severe

Co-trimoxazole (Oral Route)

Do not consume Losartan with Co-trimoxazole. If concurrent use is essential, please consult your doctor. They may monitor your potassium levels closely.

Severe

Eplerenone (Oral Route)

If concurrent use is essential, watch out for symptoms such as muscle weakness, fatigue, cramps, nausea, vomiting, tingling, numbness or irregular heartbeat and consult your doctor if you experience them. They may also monitor your potassium levels closely.

Severe

Spironolactone (Oral Route)

If concurrent use is essential, watch out for symptoms such as dizziness, fatigue, confusion, weight loss, tingling in hands and feet, nausea, diarrhea, loss of appetite, difficulty concentrating, or taste changes, and consult your doctor if you experience them. They may adjust the doses as per the observations.

Severe

Triamterene (Oral Route)

Do not consume Losartan with Triamterene if you have kidney disorders. If concurrent use is essential, your doctor may monitor your potassium levels closely. and adjust the dose of Triamterene as per the observations.

Frequently asked questions

Can I feel dizzy after taking Lostar 25mg Tablet?

Yes, the use of Lostar 25mg Tablet can make you feel dizzy. This may occur when you suddenly get up from a lying or sitting position. To lower the chance of feeling dizzy or passing out, rise slowly if you have been sitting or lying down.

Is Lostar 25mg Tablet a good blood pressure medicine?

Lostar 25mg Tablet is used by many people for reducing blood pressure levels. This medicine generally has very few side effects. In addition to lowering blood pressure, it also protects kidney function in high blood pressure patients having diabetes and impaired kidney function (diabetic nephropathy). It is also used to treat chronic heart failure when treatment with other medicines fails to prove effective. It also helps to decrease the risk of stroke in patients who are hypertensive and have thicker left ventricle (heart chamber).

What are some of the lifestyle changes I should make while using Lostar 25mg Tablet?

Lifestyle changes play a major role in keeping you healthy if you are taking Lostar 25mg Tablet. Avoid taking excess salt in your diet and find ways to reduce or manage stress in your life. Practice yoga or meditation or take up a hobby. Ensure that you have a sound sleep every night as this also helps to reduce stress levels and helps to keep your blood pressure normal. Stop smoking and alcohol consumption as this helps in lowering your blood pressure and preventing heart problems. Exercise regularly and take a balanced diet that includes whole grains, fresh fruits, vegetables, and fat-free products. Consult your doctor if you need any further guidance to get the maximum benefit of Lostar 25mg Tablet and to keep yourself healthy.

For how long do I need to take Lostar 25mg Tablet?

You may have to take Lostar 25mg Tablet for a long term, even life long. Lostar 25mg Tablet only controls blood pressure but does not cure it. Talk to your doctor in case you have any concerns regarding Lostar 25mg Tablet, but do not stop taking it without consulting the doctor.

Does Lostar 25mg Tablet cause weight gain?

No, Lostar 25mg Tablet does not cause weight gain. However, if the medicine starts affecting your kidney function then your body may swell due to the accumulation of water, resulting in weight gain. Call your doctor if you experience unexplained weight gain or swelling in your feet, ankles, or hands.

What are the long-term side effects of Lostar 25mg Tablet?

Long-term use of Lostar 25mg Tablet is generally considered to be safe. However, in some cases, long-term use of Lostar 25mg Tablet may adversely affect the functioning of the kidneys. Therefore, the doctor may prescribe regular blood tests to keep a track of how well the kidneys are working.

Is Lostar 25mg Tablet bad for the kidneys?

Yes, Lostar 25mg Tablet may impair the kidney function of patients, especially those who have severe heart failure, chronic kidney disease, or narrow or blocked blood vessels that lead to the kidneys (renal artery stenosis). It may also affect kidney function in patients who have experienced severe fluid loss or dehydration due to vomiting, diarrhea, or excessive use of diuretics. Therefore, Lostar 25mg Tablet should be used cautiously in these patients and their kidney function should be regularly monitored.

How long does Lostar 25mg Tablet take to work?

The blood pressure-lowering effect of Lostar 25mg Tablet can be seen after about 6 hours of taking it. The effect of the medicine lasts for about 24 hours. However, you may have to take the medicine for about 3-6 weeks to see the full benefits.

When and how should Lostar 25mg Tablet be taken?

Take Lostar 25mg Tablet exactly as per your doctor’s advice. Lostar 25mg Tablet tablets are meant for oral intake. Swallow the tablet with water. You can take it with or without food. The dose will depend on the condition you are being treated for. It is recommended that you take your first dose before bedtime, as it can make you dizzy. After taking the first dose, you can take it at any time of the day but try to take it at the same time each day.

What is the most important information that I need to know about Lostar 25mg Tablet?

Taking Lostar 25mg Tablet during the last 6 months of pregnancy can cause serious harm or even endanger the life of the unborn baby. Hence, it is important to inform the doctor if you are pregnant or plan to become pregnant. If you become pregnant while taking Lostar 25mg Tablet, stop taking Lostar 25mg Tablet and call your doctor immediately.

Fact Box

Chemical Class

Biphenyl derivative

Habit Forming

Therapeutic Class

CARDIAC

Action Class

Angiotensin Receptor Blockers (ARBs)

Related lab tests

Kidney Function Test

References

Hilal-Dandan R. Renin and Angiotensin. In: Brunton LL, Chabner BA, Knollmann BC, editors. Goodman & Gilman’s: The Pharmacological Basis of Therapeutics. 12th ed. New York, New York: McGraw-Hill Medical; 2011. p. 738.
Pfeffer MA, Opie LH. Inhibitors of the Renin-Angiotensin-Aldosterone System. In: Opie LH, Gersh BJ, editors. Drugs for the Heart. 8th ed. Philadelphia, Pennsylvania: Elsevier Saunders; 2013. pp. 156-57.
Briggs GG, Freeman RK, editors. A Reference Guide to Fetal and Neonatal Risk: Drugs in Pregnancy and Lactation. 10th ed. Philadelphia, PA: Wolters Kluwer Health; 2015. pp. 821-23.
Drugs and Lactation Database (LactMed) [Internet]. Bethesda (MD): National Library of Medicine (US); 2006. Losartan. [Updated 2020 Jan 20]. [Accessed 19 Feb. 2020] (online) Available from:
Central Drugs Standard Control Organisation (CDSCO). [Accessed 19 Mar. 2019] (online) Available from:
National Health Service. Pregnancy, breastfeeding and fertility while taking losartan. [Accessed 07 Aug. 2023]. (online) Available from:
Losartan potassium [Product Information]. Pennington, NJ: Zydus Pharmaceuticals (USA) Inc. [Accessed 02 Apr. 2025] (online). Available from:

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Tata 1mg's sole intention is to ensure that its consumers get information that is expert-reviewed, accurate and trustworthy. However, the information contained herein should NOT be used as a substitute for the advice of a qualified physician. The information provided here is for informational purposes only. This may not cover everything about particular health conditions, lab tests, medicines, all possible side effects, drug interactions, warnings, alerts, etc. Please consult your doctor and discuss all your queries related to any disease or medicine. We intend to support, not replace, the doctor-patient relationship.

Marketer details

Name: Minova Life Sciences Pvt Ltd
Address: Minova Life Sciences Pvt Ltd., No. 4, Sujay House, Uttaradimutt Road, Shankarpuram, Bangalore-560004

Vendor Details

Country of origin: India

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Why we need a prescription?

Provide right medicines

Prescriptions are complex documents. We proof read and recheck at various steps to provide you the right medication in the correct form and dose

In accordance with the law

Most medicines cannot be sold without a valid prescription, as per the Drugs and Cosmetics Act, 1940 and Rules, 1945

Lostar 25mg Tablet

Save more with additional offers

Save more with additional offers

General Information

Contains

Marketer

Storage

Product introduction

Uses of Lostar Tablet

Benefits of Lostar Tablet

Side effects of Lostar Tablet

How to use Lostar Tablet

How Lostar Tablet works

All substitutes for Lostar 25mg Tablet

COsart 25 Tablet

Losatan 25mg Tablet

Losar 25 Tablet

Repace 25 Tablet

Covance 25 Tablet

Quick tips

Safety advice

Alcohol

Pregnancy

Breast feeding

Driving

Kidney

Liver

Interaction with drugs

Amiloride (Oral Route)

Co-trimoxazole (Oral Route)

Eplerenone (Oral Route)

Spironolactone (Oral Route)

Triamterene (Oral Route)

Frequently asked questions

Can I feel dizzy after taking Lostar 25mg Tablet?

Is Lostar 25mg Tablet a good blood pressure medicine?

What are some of the lifestyle changes I should make while using Lostar 25mg Tablet?

For how long do I need to take Lostar 25mg Tablet?

Does Lostar 25mg Tablet cause weight gain?

What are the long-term side effects of Lostar 25mg Tablet?

Is Lostar 25mg Tablet bad for the kidneys?

How long does Lostar 25mg Tablet take to work?

When and how should Lostar 25mg Tablet be taken?

What is the most important information that I need to know about Lostar 25mg Tablet?

Fact Box

Chemical Class

Habit Forming

Therapeutic Class

Action Class

Related lab tests

Kidney Function Test

References

Want to know more

Have issue with the content

Disclaimer

Marketer details

Vendor Details

Lab tests offered by us

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