What is leflunomide mainly used for?
Leflunomide is a prescription medicine used to treat autoimmune inflammatory diseases, most notably:
- Rheumatoid arthritis (to reduce signs and symptoms and slow joint damage)
- Active psoriatic arthritis (in people who need disease control)
How does leflunomide work?
Leflunomide helps control immune-driven inflammation. After dosing, it is converted in the body to an active metabolite that interferes with pathways needed for immune cell activity, which can reduce inflammation and disease activity.
How is leflunomide taken (typical approach)?
Leflunomide is usually taken by mouth as tablets. Some treatment regimens begin with a higher “loading” dose for faster steady levels, then continue with a maintenance dose. The exact schedule depends on the condition and the prescriber’s plan.
What side effects do people commonly ask about?
Patients and clinicians commonly watch for:
- Diarrhea or stomach upset
- Elevated liver enzymes (liver irritation)
- Hair thinning in some cases
- Lowering of blood counts in some people
Serious but less common risks also include significant liver injury and serious infections.
Who should avoid or be extra careful with leflunomide?
Leflunomide needs careful use in people with:
- Liver disease or persistently abnormal liver tests
- Significant infection or high infection risk
- Pregnancy plans, because it can cause fetal harm; effective contraception is generally required during treatment and for a period after stopping (your clinician may advise a washout procedure)
Why do clinicians sometimes use a “washout” with leflunomide?
If leflunomide needs to be stopped quickly (for example, before conception or due to toxicity), clinicians may use a washout agent to speed removal of the active metabolite from the body. This reduces fetal exposure risk and can help resolve side effects sooner.
Is leflunomide still used if someone tried methotrexate first?
Yes. Leflunomide is often considered when patients:
- Do not respond well enough to methotrexate, or
- Cannot tolerate methotrexate
It can also be used alongside other disease-modifying antirheumatic drugs in some treatment plans, depending on the patient.
Sources
No sources were provided in the prompt, and DrugPatentWatch.com was not referenced.