Losartan: Uses – Side Effects – Warnings

Losartan is a medication commonly prescribed to patients suffering from high blood pressure or hypertension. This drug belongs to a class of drugs known as angiotensin receptor blockers (ARBs), which work by relaxing blood vessels, allowing blood to flow more easily. Losartan is available in tablet form and should only be taken under the supervision of a healthcare professional. In this article, we will explore the uses, benefits, side effects, and warnings associated with losartan.


Losartan is primarily used to treat hypertension, a medical condition in which the force of blood against the artery walls is consistently too high. By blocking the action of a hormone called angiotensin II, losartan helps to widen blood vessels, reducing blood pressure and improving blood flow. This medication is often prescribed to individuals who have tried lifestyle changes but still struggle to maintain healthy blood pressure levels.


Losartan offers several benefits to patients suffering from hypertension. Some of the key advantages of this medication include:

  • Reduced risk of heart attack and stroke: By effectively managing blood pressure, losartan helps lower the risk of heart-related conditions.
  • Kidney protection: High blood pressure can cause damage to the kidneys. Losartan may help reduce this risk and slow down any existing kidney damage.
  • Improved heart health: Losartan is sometimes prescribed to individuals with heart failure, as it can help the heart work more efficiently and improve overall cardiac function.

Side Effects

Like any medication, losartan can have potential side effects. It is important to be aware of these side effects and consult with a healthcare professional if they become severe or persistent. Some common side effects associated with losartan may include:

  • Dizziness and lightheadedness
  • Fatigue
  • Headache
  • Diarrhea
  • Back pain
  • Stomach pain

While these side effects are generally mild and temporary, it is crucial to seek immediate medical attention if you experience any serious symptoms, such as allergic reactions, difficulty breathing, or swelling of the face, lips, tongue, or throat.


Before starting losartan, it is essential to discuss any pre-existing medical conditions or allergies with your healthcare provider. Losartan may not be suitable for individuals with certain health issues, including:

  • Liver disease
  • Kidney disease
  • Heart conditions
  • Diabetes
  • Allergic reactions to medications

Pregnant women or those planning to become pregnant should also consult their doctor before taking losartan. It is important to note that losartan may interact with other medications, so it is crucial to inform your healthcare provider about any other drugs or supplements you are currently taking.


Can losartan be used to treat other medical conditions besides hypertension?

While losartan is primarily prescribed for hypertension, it may also be used to treat other conditions, such as heart failure. Consult your doctor for more information.

How long does it take for losartan to start working?

The effects of losartan may be seen within a few hours to a week, depending on the individual. However, it is important to follow the prescribed dosage and give the medication time to take effect.

Can I stop taking losartan if my blood pressure is under control?

No, you should never stop taking losartan without consulting your doctor, even if your blood pressure is under control. Suddenly discontinuing the medication can cause a sudden increase in blood pressure.

Are there any dietary restrictions while taking losartan?

There are no specific dietary restrictions associated with losartan. However, it is always recommended to follow a balanced and healthy diet to support overall cardiovascular health.

How often should I have my blood pressure checked while taking losartan?

Your doctor will determine how often you should have your blood pressure checked. It may vary depending on your individual circumstances and response to the medication. Regular monitoring is important to ensure the medication is effective in maintaining healthy blood pressure levels.

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