Losartan Potassium Tablets: Benefits, Dosage, and Precautions
Losartan Potassium is a commonly prescribed medicine used to manage high blood pressure and protect vital organs such as the heart and kidneys. Losartan Tablets are widely used for this purpose. Below is a detailed guide to help you understand how Losartan Potassium works and what you should know before using it.
What Is Losartan Potassium and What Is It Used For?
Losartan belongs to a group of medicines called angiotensin-II receptor antagonists. Angiotensin-II is a substance produced in the body that causes blood vessels to tighten, leading to increased blood pressure. Losartan blocks this action, allowing blood vessels to relax and helping lower blood pressure.
In addition to controlling blood pressure, Losartan also helps slow the progression of kidney damage in patients with high blood pressure and type 2 diabetes.
Losartan Potassium Is Used To:
Treat high blood pressure (hypertension) in adults and in children aged 6–18 years
Protect kidney function in hypertensive patients with type 2 diabetes and protein in the urine
Treat chronic heart failure when ACE inhibitors are not suitable
Reduce the risk of stroke in patients with high blood pressure and thickening of the heart’s left ventricle (LIFE indication)
What You Need to Know Before Taking Losartan Potassium
Do Not Take Losartan Potassium If:
You are allergic to losartan or any of its ingredients
You are more than 3 months pregnant
You have severely impaired liver function
You have diabetes or kidney problems and are taking aliskiren
Talk to your doctor before taking Losartan Potassium if you:
Have had angioedema (swelling of face, lips, throat, or tongue)
Experience severe vomiting or diarrhoea
Are taking diuretics or following a strict low-salt diet
Have kidney artery narrowing or a recent kidney transplant
Have liver disease, heart failure, or heart valve problems
Have coronary heart disease or cerebrovascular disease
Have primary hyperaldosteronism
Are taking ACE inhibitors or aliskiren
Are using medicines that may increase potassium levels
Your doctor may regularly monitor your blood pressure, kidney function, and electrolyte levels during treatment.
Use in Children and Adolescents
Not recommended for children under 6 years
Limited data for children with kidney or liver problems
Side effects in children are similar to those in adults
Other Medicines and Losartan Potassium
Tell your doctor if you are taking:
Potassium supplements or potassium-sparing diuretics
Other blood pressure medicines
NSAIDs (such as indomethacin or COX-2 inhibitors)
Lithium-containing medicines
Some combinations may require dose adjustments or close monitoring.
Food, Drink, and Losartan Potassium
Can be taken with or without food
Avoid grapefruit juice during treatment
Pregnancy and Breastfeeding
Losartan Potassium is not recommended during early pregnancy and must not be used after the third month, as it can seriously harm the unborn baby.
Losartan is not recommended while breastfeeding, especially for newborn or premature babies. Your doctor may suggest an alternative treatment.
Important Information About Ingredients
Losartan Potassium contains lactose monohydrate. If you have an intolerance to certain sugars, consult your doctor before taking this medicine.
How to Take Losartan Potassium
Always take this medicine exactly as prescribed by your doctor.
Adults With High Blood Pressure
Starting dose: 50 mg once daily
May be increased to 100 mg once daily if needed
Adults With High Blood Pressure and Type 2 Diabetes
Starting dose: 50 mg once daily
May increase to 100 mg once daily
Starting dose: 12.5 mg once daily
Dose increased gradually up to 150 mg once daily, if required
Children Aged 6–18 Years
Dose based on body weight
Starting dose: 0.7 mg per kg once daily (up to 25 mg)
Swallow tablets whole with water
Take at the same time each day
Continue treatment unless advised otherwise by your doctor
If You Take Too Much or Miss a Dose
Overdose: Seek medical attention immediately
Missed dose: Take the next dose as normal—do not double the dose
Seek Immediate Medical Help If You Experience:
Severe allergic reactions such as swelling of the face, lips, mouth, or throat
Difficulty breathing or swallowing
Changes in kidney function
Uncommon to Rare Side Effects:
Headache, sleep disturbances
Chest pain, shortness of breath
Digestive issues (nausea, diarrhoea)
Heart rhythm disturbances
Side effects in children are similar to those in adults.
How to Store Losartan Potassium
Keep out of reach of children
Do not use after the expiry date
Dispose of unused medicine responsibly
Pack Information and Composition
Active ingredient: Losartan potassium
Contains lactose, cellulose, magnesium stearate, starch, and titanium dioxide
Tablets are available in blister packs and bottles in various quantities.
Final Note Always consult your doctor or pharmacist before starting or stopping Losartan Potassium. This information is intended to support, not replace, professional medical advice.