Leflunomide

What Is Leflunomide

Leflunomide is a prescription medicine used to treat autoimmune diseases such as rheumatoid arthritis. A rheumatologist usually prescribes this medicine. A rheumatologist is a doctor who treats joint, muscle, and autoimmune conditions.

Rheumatoid arthritis is a long-term disease where the body’s immune system mistakenly attacks the joints. This leads to pain, swelling, stiffness, and joint damage over time.

Leflunomide helps slow down this abnormal immune response.

It is taken as an oral tablet, usually once daily, depending on the doctor’s advice.

Regular use helps reduce joint pain, swelling, and long-term joint damage.

What This Medicine Does in the Body

Leflunomide works by reducing the activity of the immune system.

In autoimmune diseases, the immune system becomes overactive and attacks healthy tissues, especially joints.

This causes inflammation, pain, and damage in the joints.

Leflunomide blocks the production of certain immune cells that multiply quickly during inflammation.

It does this by blocking an enzyme needed for cell growth called dihydroorotate dehydrogenase (DHODH).

This enzyme is important for making DNA in rapidly dividing cells.

By blocking this enzyme, Leflunomide slows down the growth of overactive immune cells.

This reduces inflammation and helps protect joints from damage.

Over time, it helps control disease progression rather than only relieving symptoms.

Uses of Leflunomide / Leflunomide Used For

Doctors prescribe Leflunomide mainly for rheumatoid arthritis.

It helps reduce joint pain, swelling, and stiffness caused by immune system activity.

It is used in patients who need long-term control of disease progression.

The medicine may also be used in some cases of other autoimmune joint diseases as advised by a specialist.

It helps improve daily movement, reduce morning stiffness, and protect joint structure over time.

Leflunomide is often used when other treatments are not sufficient or when stronger disease control is needed.

Regular follow-up is important because autoimmune diseases require long-term management.

How Leflunomide Works

Leflunomide works by controlling the immune system’s overactivity.

It blocks the DHODH enzyme, which is needed for producing DNA in rapidly growing immune cells.

Without this enzyme, immune cells cannot multiply quickly.

This slows down the immune response that causes joint inflammation.

As immune activity decreases, swelling, pain, and stiffness in the joints reduce.

This also helps prevent long-term damage to bones and cartilage.

The medicine does not provide immediate pain relief but works gradually over weeks.

Doctors usually monitor response and adjust treatment based on improvement.

Side Effects of Leflunomide

Like all medicines, Leflunomide may cause side effects, although not everyone experiences them.

Some patients may experience diarrhea, nausea, or stomach discomfort.

Headache or dizziness may also occur in some individuals.

A common concern is increased risk of infections because the immune system becomes less active.

This means the body may take longer to fight infections.

Some patients may also experience hair thinning or mild weight loss.

Rarely, liver problems may occur. The liver is the organ that processes medicines and removes toxins from the body.

Patients should avoid alcohol and undergo regular liver function tests during treatment.

Very rarely, serious skin reactions or allergic responses may occur.

Doctors should be contacted immediately if there is yellowing of eyes, severe fatigue, or signs of infection.

Medical Disclaimer

This content is for informational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a rheumatologist or healthcare professional before starting or changing Leflunomide treatment. Use this medicine only as prescribed and follow regular monitoring for safe and effective long-term disease control.