Introduction

Leflunomide (brand name Arava) is a disease-modifying antirheumatic drug (DMARD) often prescribed when methotrexate is not enough to control rheumatoid arthritis (RA). It helps reduce inflammation and prevent joint damage, but it also comes with potential side effects. Understanding leflunomide side effects in rheumatoid arthritis patients helps improve safety and long-term outcomes.

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1. Liver Toxicity and Regular Monitoring

One of the most important leflunomide side effects in rheumatoid arthritis patients is liver toxicity. Leflunomide can raise liver enzyme levels, and in rare cases, cause serious liver injury. Patients should have regular blood tests, and alcohol should be avoided to minimize risks.

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2. High Blood Pressure (Hypertension)

Leflunomide may increase blood pressure in some patients. Doctors often recommend regular blood pressure checks, especially in older adults or those with a history of hypertension.

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3. Gastrointestinal Problems

Diarrhea, nausea, and abdominal discomfort are among the most common leflunomide adverse effects. These symptoms may improve over time, but persistent problems should be discussed with a healthcare provider.

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4. Increased Risk of Infections

Because leflunomide suppresses the immune system, it can increase vulnerability to infections such as respiratory or urinary tract infections. Patients should report fevers, coughs, or other concerning symptoms promptly.

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5. Pregnancy and Birth Defects

Leflunomide is known to cause birth defects and must not be used during pregnancy. Women of childbearing age should use effective contraception while taking the drug and for a period after stopping, unless a drug elimination procedure is performed.

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How Leflunomide Side Effects Differ from Other RA Drugs

Leflunomide is one of several DMARDs used in arthritis treatment. Patients often compare it with other medications like methotrexate side effects in elderly patients or biologics such as Humira side effects in rheumatoid arthritis. Understanding similarities and differences can help patients make informed choices with their doctors.

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Conclusion

While leflunomide is an effective RA treatment, awareness of side effects in rheumatoid arthritis patients is crucial. Regular blood tests, blood pressure monitoring, and careful family planning are essential for safe use. Patients should never stop or adjust their dose without consulting their rheumatologist. For more information, see the NIH MedlinePlus Leflunomide Guide.