Arava (Leflunomide) – Patient Information (UK)

Arava is a medicine used to treat certain long-term inflammatory conditions, most commonly rheumatoid arthritis and some types of psoriatic arthritis. This page explains how Arava works, how it is taken, common safety considerations, and practical tips to help you get the most from your treatment.

This information is written for patients in the United Kingdom and is intended to be helpful and patient-friendly. It does not replace advice from a healthcare professional.

Quick overview

• Medicine name: Arava
• Active ingredient: Leflunomide
• Medicine type: Disease-modifying anti-rheumatic drug (DMARD)
• Common uses: Rheumatoid arthritis; psoriatic arthritis (certain cases)
• How it’s taken: Usually once daily by mouth (tablets)
• Onset: May take weeks to show full benefits
• Key safety topics: Liver effects, blood cell changes, pregnancy prevention requirements, infections

Basic product information

How Arava works (mechanism of action)

Leflunomide helps reduce inflammation and slow down immune-driven damage in conditions such as rheumatoid arthritis. After taking Arava, the body converts leflunomide into its active form (primarily an active metabolite called A77 1726).

Key mechanism:

• Leflunomide works by inhibiting an enzyme involved in the immune response. This helps reduce the abnormal activity of immune cells that contribute to joint swelling, pain, and progressive joint damage.
• It can help decrease disease activity over time and reduce the need for symptom-only treatments by targeting the underlying inflammatory process.

Pharmacokinetics (what the body does with it)

Understanding pharmacokinetics can help you appreciate why Arava takes time to work and why long-term precautions are important.

• Absorption: After oral administration, leflunomide is absorbed and converted to its active metabolite.
• Active metabolite: The active metabolite (A77 1726) can remain in the body for a long time.
• Half-life: Because of the persistence of the active metabolite, drug levels may stay elevated for an extended period after stopping Arava.
• Steady state: With daily dosing, levels build gradually and steady therapeutic effect may take several weeks.
• Elimination: The medicine is eliminated mainly through metabolic pathways and biliary/intestinal routes; the long persistence is a major reason for pregnancy-avoidance and “washout” procedures in some situations.

Practical takeaway: Don’t expect immediate relief on day one. Many people feel improvements within a few weeks, with fuller effects taking longer.

Typical use and indications (UK)

Arava is a DMARD prescribed to treat:

• Rheumatoid arthritis in adults.
• Psoriatic arthritis in adults (as determined by clinical guidelines and specialist assessment).

It may be used alone or together with other treatments depending on disease severity, past response, and overall health.

When to take Arava (timing and routine)

Arava is usually taken once daily at approximately the same time each day.

• Consistency helps: Try to take your dose at the same time each day to maintain stable levels.
• Missed dose: If you miss a dose, take it when you remember unless it is close to the time of the next dose. Do not take a double dose to make up for a missed tablet.
• Time to benefit: Early improvement can start in the first few weeks; the full effect may take several weeks (sometimes longer).

Food interactions and meal advice

Leflunomide can generally be taken with or without food. Many patients find it easier to take with meals or at the same time as a regular meal to reduce stomach upset.

General advice:

• If Arava upsets your stomach, consider taking it with food.
• Continue a consistent routine (food timing does not typically replace the need for monitoring, but it may improve tolerability).

Alcohol and medicine interactions

Alcohol

Arava may affect the liver. For this reason, it’s important to consider alcohol carefully.

• Avoid heavy drinking and follow your prescriber’s advice about safe limits.
• Even moderate alcohol may be a concern if you already have liver enzyme abnormalities or other liver risk factors.

Seek advice urgently if you develop symptoms that could suggest liver problems, such as:

• unusual fatigue or weakness
• loss of appetite
• nausea or vomiting
• yellowing of the skin or eyes (jaundice)
• dark urine or pale stools

Important medicine interactions

Arava interacts with some medicines because of effects on the immune system, liver metabolism, or blood cell production.

Common interaction themes to discuss with your healthcare professional or pharmacist:

• Liver-impacting medicines: Other medicines that can affect the liver may increase risk.
• Medicines affecting blood counts: Combinations that can lower blood cells may increase infection risk.
• Immunosuppressants: Using other immune-modifying medicines together may increase infection risk.
• Warfarin and anticoagulants: Because leflunomide can affect drug handling, careful monitoring may be needed if you take warfarin or similar medicines.
• Potential antibiotic interactions: Some antibiotics may interact with the active metabolite and can lead to faster removal from the body.

Always tell your pharmacist about all medicines you take, including:

• prescription medicines
• over-the-counter products
• herbal supplements
• vaccines (timing may matter)
• topical or dental medicines (rarely relevant, but worth mentioning)

Dosing (how much and how it may be adjusted)

Dosing is individualised based on your condition, response, and blood test results.

• Typical approach: Many regimens begin with an initial period often referred to as a “loading” phase, followed by a lower maintenance dose.
• Maintenance dosing: The maintenance dose is taken once daily.
• Adjustments: Your clinician may adjust the dose based on:
  • liver enzymes (ALT/AST)
  • full blood count results
  • treatment response
  • side effects
  • concurrent medicines

Very important: Follow the dosing instructions provided by your healthcare professional. The dose on your medicine label is designed for your situation.

Safety profile and when to get help

Like all DMARDs, Arava can cause side effects. Most people tolerate it, but monitoring is essential.

Common side effects

• Mild gastrointestinal symptoms: nausea, diarrhoea, abdominal discomfort
• Headache
• Increases in liver enzymes (often detected on blood tests before symptoms occur)
• Reduced white blood cells or other blood count changes (detected on routine blood tests)
• Skin reactions (rash in some people)

Serious side effects (seek medical help promptly)

Contact a healthcare professional urgently if you experience any of the following:

• Signs of severe infection: fever, chills, severe sore throat, shortness of breath
• Symptoms suggestive of liver injury: yellowing of the skin/eyes, dark urine, severe persistent nausea or vomiting
• Severe allergic reaction: swelling of face/lips, difficulty breathing
• Severe skin reactions: blistering, peeling skin, painful sores
• Unexplained bruising or bleeding (possible blood cell effects)

Pregnancy, contraception, and breastfeeding (important UK guidance)

Leflunomide can be harmful to an unborn baby. UK prescribing practices typically require strict pregnancy prevention measures.

• Do not use in pregnancy.
• Use effective contraception during treatment.
• Because the active metabolite can stay in the body for a long time, if pregnancy is planned or suspected, clinicians may recommend a specialised elimination (“washout”) procedure and confirm clearance using blood tests.
• Breastfeeding: discuss with your clinician; many clinicians recommend avoiding breastfeeding while on leflunomide depending on risk assessment and timing.

If pregnancy is possible: speak to your prescriber urgently for guidance on safe next steps.

Vaccines and infection precautions

• Because Arava can affect immune function, you should inform your healthcare team before receiving vaccinations.
• Live vaccines may not be appropriate; timing depends on your treatment status and other medicines.

Practical use tips

• Attend monitoring appointments: Blood tests are a key safety requirement (commonly liver enzymes and full blood count).
• Keep a symptom diary: Note infections, unusual bruising, persistent diarrhoea, rashes, or fatigue.
• Stay hydrated: If you experience diarrhoea, drinking fluids can help reduce dehydration risk.
• Avoid alcohol excess: Limit alcohol to reduce liver strain.
• Review all medicines: Each new medicine you start—prescription or over-the-counter—should be checked for interactions.
• Use one pharmacy: Helps your pharmacist spot interactions and duplication.

What to expect in the first weeks

Arava is designed to modify the course of inflammatory disease. That means results may not be immediate.

• Early phase: Some people notice reduced joint stiffness or swelling after a few weeks.
• Full benefit: May take longer; your clinician may also use other treatments (for example, short-term symptom relief) while waiting for Arava to take full effect.
• Monitoring: Regular blood tests guide safety and dosing decisions.

Alternative options (discuss with your clinician)

If Arava is not suitable or not effective, there are other DMARDs and treatment pathways for rheumatoid arthritis and psoriatic arthritis. Your choices depend on disease severity, previous treatment response, comorbidities, and safety considerations.

Conventional DMARD alternatives

• Methotrexate (often first-line in rheumatoid arthritis)
• Sulfasalazine
• Hydroxychloroquine
• Other immunomodulatory approaches depending on your condition

Biologic and targeted therapies

• TNF inhibitors
• Interleukin inhibitors and other targeted options
• JAK inhibitors (in selected cases, with careful risk evaluation)

Important: Alternatives vary widely in side effect profiles, monitoring needs, vaccination considerations, and infection risks. Choose options with your specialist team.

Market and legal context for the UK

In the United Kingdom, Arava (leflunomide) is a recognised medicine used in the management of inflammatory arthritis. Guidance and prescribing practices are informed by:

• National and specialist treatment recommendations for rheumatoid arthritis and psoriatic arthritis
• Medicines regulation and pharmacovigilance through UK authorities
• Ongoing safety updates based on emerging clinical evidence

UK healthcare systems typically emphasise the importance of:

• appropriate patient selection
• baseline blood testing and ongoing monitoring
• clear counselling around pregnancy risks and contraception
• prompt management of side effects and infections

Recent guidance and monitoring priorities (UK-focused)

While individual care varies, UK clinical practice generally reinforces the following ongoing themes:

• Regular laboratory monitoring for liver enzymes and blood counts.
• Infection awareness: patients are counselled to seek medical advice quickly for fever or signs of infection.
• Contraception and pregnancy risk management are consistently stressed because of the long persistence of the active metabolite.
• Review of concomitant medications to avoid liver toxicity and harmful interaction combinations.
• Shared decision-making around benefits vs risks, including lifestyle factors such as alcohol intake.

Tip: If you are unsure what tests you should be having and how often, check your monitoring schedule with your clinician or pharmacist.

Delivery and availability (UK online pharmacy)

Availability can vary depending on manufacturer supply and tablet strength. Most online pharmacies in the UK aim to stock common strengths and can source alternatives when needed.

• Dispatch times: Many UK pharmacies dispatch within one to two working days (subject to stock availability).
• Delivery options: Delivery is typically made by courier or Royal Mail services depending on the pharmacy’s network and order value.
• Tracking: Tracking details are often provided once your order is dispatched.
• Cold chain: Arava does not usually require refrigeration.

If a product is temporarily unavailable, reputable pharmacies often contact you with an expected availability date or a suitable alternative (subject to clinical appropriateness).

FAQ

1) How quickly does Arava start working?

Some people notice improvements within a few weeks, but full benefit may take several weeks. Consistent daily dosing and follow-up appointments are important.

2) Can I take Arava with food?

Yes. Arava can generally be taken with or without food. Taking it with meals may help if you experience stomach upset.

3) What monitoring will I need?

Common monitoring includes blood tests for liver enzymes and full blood count. Your clinician will set the schedule based on your risk factors and response.

4) Is it safe to drink alcohol while on Arava?

Alcohol may increase risk of liver problems. You should discuss what level (if any) is safe for you. Avoid heavy drinking and follow your healthcare professional’s advice.

5) Can I take Arava if I have liver problems?

Arava may not be suitable for some patients with existing liver disease or elevated liver enzymes. Your clinician will assess your history and blood test results.

6) What should I do if I develop a fever or infection?

Because Arava affects the immune system, contact a healthcare professional promptly if you develop fever, feel significantly unwell, or have signs of infection.

7) Can I stop Arava suddenly?

Do not stop or change the dose without medical advice. If stopping is planned, your clinician may discuss monitoring and—where relevant—options to help clear the active metabolite more quickly.

8) What happens if I miss a dose?

Take it when you remember unless it’s close to the next dose. Do not take two doses at the same time to catch up.

9) Are there alternatives if Arava isn’t working?

Yes. There are other DMARDs, biologic medicines, and targeted options depending on your diagnosis and treatment history. Discuss the best next step with your clinician.

10) Does Arava affect vaccines?

It may. Inform your healthcare team before vaccinations, especially before live vaccines. Timing may be adjusted based on your treatment plan.

Need help? If you have questions about your dosing schedule, monitoring blood tests, or how to manage side effects, speak to a healthcare professional or pharmacist.