Ficha farmacologica del losartan

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If you’re looking for detailed information about the pharmacology of Losartan, you’ve come to the right place. Losartan is a commonly prescribed medication for treating high blood pressure and other cardiovascular conditions. Let’s dive into the pharmacological profile of this important drug.

Benefits of Losartan:

Losartan is a medication used to treat high blood pressure (hypertension) and to reduce the risk of stroke in patients with high blood pressure and left ventricular hypertrophy. It belongs to a class of drugs known as angiotensin receptor blockers (ARBs), which work by relaxing blood vessels, allowing blood to flow more easily.

Some key benefits of Losartan include:

  • Lowering blood pressure
  • Reducing the risk of stroke
  • Protecting the kidneys in patients with diabetes
  • Improving heart function in patients with heart failure
  • Helping to prevent cardiovascular events in high-risk individuals



Losartan is a medication that belongs to a class of drugs known as angiotensin II receptor blockers. It is commonly used to treat high blood pressure, heart failure, and to protect the kidneys from damage due to diabetes.

1. Reduces high blood pressure: Losartan helps to relax the blood vessels, making it easier for the heart to pump blood and lowering blood pressure.
2. Protects the heart: By reducing blood pressure and workload on the heart, Losartan can help protect the heart from damage and lower the risk of heart-related complications.
3. Manages heart failure: Losartan can improve symptoms of heart failure and help patients live longer and healthier lives.
4. Prevents kidney damage: Losartan can slow down the progression of kidney damage in patients with diabetes, reducing the risk of kidney failure.
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Side Effects of Losartan

While Losartan is generally well-tolerated, some individuals may experience certain side effects. It is important to be aware of these potential side effects before starting treatment with Losartan. Common side effects of Losartan may include:

Side Effect Description
Dizziness Some individuals may experience dizziness as a side effect of Losartan. It is recommended to avoid activities that require alertness if experiencing dizziness.
Cough Cough is another common side effect of Losartan. If persistent or bothersome, it is advisable to consult a healthcare provider.
Fatigue Some individuals may feel fatigued while taking Losartan. It is essential to get an adequate amount of rest and consult a healthcare provider if the fatigue persists.
Low Blood Pressure Losartan may cause a decrease in blood pressure, leading to symptoms such as lightheadedness or fainting. It is important to monitor blood pressure regularly.

If you experience any severe or persistent side effects while taking Losartan, it is crucial to seek medical attention promptly. Your healthcare provider can provide guidance on managing side effects and adjust the treatment if needed.

Side Effects

Losartan, like any medication, can cause side effects. Common side effects include dizziness, headache, fatigue, and cough. While these side effects are generally mild, it is important to consult your healthcare provider if they persist or worsen.

Less common but more serious side effects may include chest pain, rapid heartbeat, and swelling of the hands or feet. In rare cases, Losartan can cause allergic reactions such as rash, itching, or swelling of the face, tongue, or throat. If you experience any of these symptoms, seek medical attention immediately.

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Potential Risks of Losartan

Potential Risks of Losartan

  • Common side effects of Losartan may include dizziness, fatigue, and hypotension.
  • Severe allergic reactions to Losartan are rare but possible. Seek medical attention if you experience rash, itching, swelling of the face, tongue, or throat, severe dizziness, or trouble breathing.
  • Losartan may interact with other medications or substances, leading to adverse effects. Inform your healthcare provider about all the medications you are currently taking.
  • Individuals with kidney or liver problems may be at higher risk for experiencing side effects from Losartan. Consult your doctor for personalized advice.
  • Pregnant women should avoid using Losartan as it may cause harm to the unborn baby. Discuss alternative options with your healthcare provider if you are pregnant or planning to become pregnant.


It is important to follow the recommended dosage instructions provided by your healthcare provider when taking Losartan. The typical starting dose for adults with high blood pressure is 50 mg once daily. The maximum recommended daily dose is 100 mg.

For those with heart failure, the initial dose is usually 25 mg once daily, with a target dose of 50 mg once daily. The dosage may be adjusted based on individual response and tolerability.

Recommended Dosage of Losartan

For Hypertension:

The recommended starting dosage of Losartan for adults with hypertension is 50 mg once daily. Your healthcare provider may adjust the dosage based on your blood pressure response. The maximum recommended dose is 100 mg once daily.

For Hypertensive Patients with Left Ventricular Hypertrophy:

The recommended starting dose of Losartan for adults with hypertension and left ventricular hypertrophy is 50 mg once daily. Your doctor may increase the dose to 100 mg once daily if needed.

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For Renal Impairment:

For patients with mild to moderate renal impairment, the recommended starting dose of Losartan is 25 mg once daily. For those with severe renal impairment, the starting dose is 25 mg or 50 mg every other day.

It is important to follow your healthcare provider’s instructions regarding the dosage and frequency of Losartan to effectively manage your condition.


Losartan interacts with a variety of medications, supplements, and substances. It is important to discuss all medications and supplements you are taking with your healthcare provider to avoid potential interactions.

Medications that may interact with Losartan:

  • Other blood pressure medications
  • Diuretics (water pills)
  • Nonsteroidal anti-inflammatory drugs (NSAIDs)
  • Potassium supplements or salt substitutes containing potassium

Substances that may interact with Losartan:

  • Alcohol: Drinking alcohol may lower blood pressure further and increase the risk of side effects.

It is crucial to inform your doctor about all the medications, supplements, and substances you are taking to ensure the safe and effective use of Losartan.