side effects of losartan

Natashya

3 min read

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08-03-2025

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Losartan is a commonly prescribed medication used to treat high blood pressure (hypertension) and protect the kidneys in people with type 2 diabetes. While generally safe and effective, like all medications, it can cause side effects. Understanding these potential side effects is crucial for patients to manage their treatment effectively and communicate any concerns to their healthcare provider.

Common Side Effects of Losartan

Many people taking Losartan experience mild side effects that usually don't require stopping the medication. These include:

• Dizziness: This is a relatively common side effect, often occurring at the start of treatment. It typically resolves as the body adjusts to the medication. Staying hydrated and avoiding sudden movements can help.
• Headache: Similar to dizziness, headaches are frequently reported. Over-the-counter pain relievers can often provide relief.
• Fatigue: Feeling tired or weak is another possible side effect. Getting adequate rest and managing stress can be beneficial.
• Nausea: Some individuals experience nausea, which might be mild or more severe. Taking the medication with food can often help.
• Diarrhea or Constipation: Changes in bowel habits are possible side effects, though they are usually temporary. Dietary adjustments may help alleviate symptoms.

Less Common but More Serious Side Effects of Losartan

While less frequent, some side effects are more serious and require immediate medical attention. These include:

• Hypotension (Low Blood Pressure): Losartan can sometimes cause a significant drop in blood pressure, leading to dizziness, fainting, or lightheadedness. This is especially important for elderly patients or those with pre-existing conditions.
• Hyperkalemia (High Potassium Levels): Losartan can affect potassium levels in the blood. High potassium can be dangerous and requires immediate medical attention. Symptoms can include muscle weakness, fatigue, and irregular heartbeat.
• Angioedema (Facial Swelling): This is a rare but serious allergic reaction that causes swelling of the face, lips, tongue, or throat. It can be life-threatening and requires immediate medical attention. If you experience angioedema, stop taking Losartan and seek immediate medical help.
• Liver Problems: In rare instances, Losartan can cause liver damage. Symptoms might include jaundice (yellowing of the skin or eyes), dark urine, or abdominal pain. Consult your doctor immediately if you suspect liver problems.
• Kidney Problems: Although Losartan is often used to protect kidneys, in some cases it can worsen existing kidney problems. Regular monitoring of kidney function is important.
• Cough: A dry, persistent cough is another possible side effect. If this develops, it's important to discuss it with your doctor.

When to Contact Your Doctor

Contact your doctor immediately if you experience any of the following:

• Severe dizziness or fainting
• Swelling of the face, lips, tongue, or throat
• Chest pain
• Difficulty breathing
• Irregular heartbeat
• Unexplained fatigue or weakness
• Dark urine or yellowing of the skin or eyes

Regular check-ups with your doctor are essential while taking Losartan to monitor your blood pressure, potassium levels, and overall health.

Managing Losartan Side Effects

While some side effects are unavoidable, there are strategies to manage them:

• Start with a low dose: Your doctor will likely start you on a low dose and gradually increase it as needed. This can help minimize side effects.
• Take the medication as directed: Following your doctor's instructions carefully is crucial.
• Stay hydrated: Drinking plenty of water can help prevent dizziness and other side effects.
• Maintain a healthy lifestyle: Eating a balanced diet, exercising regularly, and managing stress can contribute to overall health and well-being, and may reduce the severity of side effects.
• Report any concerns to your doctor: Open communication with your healthcare provider is key to managing potential side effects.

Disclaimer: This article provides general information and should not be considered medical advice. Always consult your doctor or other qualified healthcare professional for any questions you may have regarding a medical condition or treatment. The information presented here is not a substitute for professional medical care.