Sarah Bennett
Leflunomide is a disease-modifying anti-rheumatic drug (DMARD) used to treat rheumatoid arthritis and psoriatic arthritis. It works by slowing down the growth of immune cells, reducing swelling and joint damage. However, this also means that leflunomide can increase your risk of infection. As a result, it is recommended that you do not receive certain vaccines right before, after, or while taking leflunomide. Live vaccines, such as the MMR (measles, mumps, and rubella) vaccine, are typically avoided by people taking leflunomide, as they may not be effective or may cause adverse reactions. It is important to consult your doctor or healthcare provider about any vaccines you may need and to ensure that you are up-to-date with your vaccinations before starting leflunomide treatment.
| Characteristics | Values |
|---|---|
| Vaccination after Leflunomide | It is not recommended to get vaccinated right before, after, or while taking Leflunomide. It is advised to consult a doctor before getting vaccinated. |
| Vaccines to avoid | Live virus vaccines such as MMR, chickenpox, and yellow fever |
| Precautions | It is recommended to get vaccinated against chickenpox before starting Leflunomide. Household members should also be vaccinated against chickenpox. |
| Side effects | Leflunomide may cause liver damage, hair loss, diarrhoea, high blood pressure, birth defects, and harm to unborn babies. |
| Contraindications | Leflunomide should not be taken by pregnant or breastfeeding women, or those planning to become pregnant or father a child. |
| Interactions | Leflunomide should not be taken with teriflunomide (Aubagio). |
| Testing | Blood tests, skin tests for TB, and pregnancy tests are recommended before starting Leflunomide. |
| Dosage | Leflunomide should be taken as directed by a doctor. |
| Storage | Leflunomide should be stored at room temperature, protected from light, and kept in a cool, dry place. |
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What You'll Learn
- It is recommended to wait at least two years after taking leflunomide before getting vaccinated
- Live vaccines are not recommended while taking leflunomide
- Inactivated vaccines are safer to administer before immunosuppressive therapy
- If you have been exposed to chickenpox or shingles, consult your doctor immediately
- Pregnant people and those planning to conceive should avoid leflunomide
It is recommended to wait at least two years after taking leflunomide before getting vaccinated
Leflunomide is a drug used to treat active rheumatoid arthritis. It works by slowing down the growth of some immune cells, which in turn reduces inflammation and joint damage. It is a prescription drug and should be taken exactly as directed by a doctor.
Leflunomide can have some side effects, including loose bowel motions, diarrhoea, and hair loss. More seriously, it may cause liver damage, especially in those who already have liver disease, and it can also cause high blood pressure. It is therefore important to consult with a doctor before taking leflunomide, and to inform them of any medications, vitamins, supplements, or herbal products you are taking.
Leflunomide can also affect the body's immune response to vaccines. It is recommended that people taking leflunomide avoid live vaccines such as MMR, chickenpox, and yellow fever. Live vaccines should not be administered while taking leflunomide, or immediately before or after. It is recommended to wait at least two years after taking leflunomide before getting a live vaccine. This is because leflunomide can remain in the body for a long time after treatment has stopped, and it may reduce the effectiveness of the vaccine.
If you have never had chickenpox, it is important to get vaccinated against it before starting leflunomide, as the virus can be dangerous while taking the drug. It is also recommended that household members get vaccinated against chickenpox before you start taking leflunomide.
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Live vaccines are not recommended while taking leflunomide
Leflunomide is a disease-modifying anti-rheumatic drug (DMARD) used to treat rheumatoid arthritis and psoriatic arthritis. It is important to note that leflunomide reduces the number of blood cells produced by the body, which can increase the risk of infection. Therefore, live vaccines are not recommended while taking leflunomide.
Live vaccines contain a small amount of a weakened form of the disease germ, which prompts the body to create antibodies to fight the disease. However, for individuals taking leflunomide, the immune response to live vaccines may be diminished or suppressed. This means that the vaccine may not be effective in providing protection against the disease, and there is a risk of developing the disease from the vaccine itself.
It is recommended that individuals taking leflunomide avoid live vaccines such as measles, mumps, rubella (MMR), chickenpox, shingles, and yellow fever. The Zostavax shingles vaccine, for example, is a live vaccine that is not recommended for people on leflunomide. However, there are alternative non-live vaccines available, such as the Shingrix vaccine for shingles, which can be considered in consultation with a healthcare professional.
It is important to discuss any vaccination plans with your rheumatology team before receiving a vaccine while taking leflunomide. In some cases, it may be necessary to delay vaccination until a certain time period after discontinuing leflunomide to ensure the vaccine's effectiveness and avoid potential interactions. Additionally, it is recommended to get vaccinated against COVID-19, pneumonia, and the yearly flu while taking leflunomide, as these vaccines are not live vaccines and are considered safe.
Overall, while taking leflunomide, it is crucial to exercise caution when considering live vaccines due to the potential risks and reduced effectiveness. Non-live vaccines, on the other hand, can be safely administered and are recommended to prevent certain diseases.
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Inactivated vaccines are safer to administer before immunosuppressive therapy
Leflunomide is a disease-modifying anti-rheumatic drug (DMARD) used for rheumatoid arthritis and psoriatic arthritis. It is recommended that people on leflunomide avoid live vaccines, such as measles, mumps, and rubella (MMR), chickenpox, and yellow fever. This is because leflunomide reduces the number of blood cells produced by the body, increasing the likelihood of contracting infections.
Inactivated vaccines are generally considered safe for immunocompromised patients as they do not pose a risk of infection. However, they induce a suboptimal immune response and often require an adjuvant or a booster dose. Inactivated vaccines are safer than live attenuated vaccines due to a lower risk of vaccine-associated infection. While they are less immunogenic, they carry a higher risk of failing to induce a protective immune response.
In order to ensure vaccine safety and induce an adequate immune response, it is recommended to administer inactivated vaccines during the lowest level of disease activity. This can be achieved by administering the vaccine before the commencement of immunosuppressive therapy, under low-dose immunosuppressive therapy, or immediately after the discontinuation of immunosuppressive therapy. Two weeks are required for the development of an immune response, so it is advised to administer inactivated vaccines at least two weeks before starting immunosuppressive therapy to avoid delaying treatment.
Several studies have evaluated the safety and efficacy of inactivated vaccines in patients treated with immunosuppressants. While the evidence is mixed, most studies have found an attenuated immune response to inactivated vaccines. For example, in a study of 73 patients with SLE on immunosuppressive therapy, administration of pneumococcal, tetanus toxoid (TT), and Haemophilus influenzae type B (Hib) inactivated vaccines resulted in a protective immune response in the majority of patients.
In summary, inactivated vaccines are generally safe to administer to immunocompromised patients, including those undergoing immunosuppressive therapy. To optimize the immune response, it is recommended to administer inactivated vaccines before starting immunosuppressive therapy or during low-dose immunosuppressive therapy. However, it is important to note that the efficacy of inactivated vaccines in this population may be reduced, and the need for adjuvants or booster doses may arise.
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If you have been exposed to chickenpox or shingles, consult your doctor immediately
If you are taking leflunomide, it is recommended that you avoid live vaccines such as the measles, mumps, and rubella (MMR) vaccine, as well as the chickenpox and yellow fever vaccines. This is because leflunomide is a disease-modifying anti-rheumatic drug (DMARD) that reduces the number of white blood cells your body makes, which can increase your chances of infection.
However, it's important to note that you should consult your doctor immediately if you have been exposed to chickenpox or shingles. While taking leflunomide, these viruses can have severe effects on your health. Your doctor may advise antiviral treatment and may pause your leflunomide treatment until you recover.
If you have never had chickenpox, it is advisable to get vaccinated before starting leflunomide. The Zostavax shingles vaccine is a live vaccine and is not recommended for people taking leflunomide. However, a non-live shingles vaccine, called Shingrix, is available and may be suitable for you. This vaccine is over 90% effective in preventing shingles and its related complications in adults with healthy immune systems. It is also recommended for adults with weakened immune systems, as it was found to be between 68% and 91% effective in this group.
Shingrix can be administered to those who have previously had shingles or chickenpox, as the virus can remain dormant and cause shingles later. It is generally recommended to wait until any shingles rash has disappeared before getting the vaccine.
In summary, if you are taking leflunomide and have been exposed to chickenpox or shingles, consult your doctor immediately. They will advise you on the necessary steps to protect your health, which may include antiviral treatment and a pause in your leflunomide medication.
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Pregnant people and those planning to conceive should avoid leflunomide
Leflunomide is a disease-modifying anti-rheumatic drug (DMARD) used to treat rheumatoid arthritis and psoriatic arthritis. It is not suitable for pregnant people or those planning to conceive.
Leflunomide is classified as a pregnancy category X medication by the US Food and Drug Administration system, indicating that studies in animals have shown fetal abnormalities. The risks involved in using the drug during pregnancy outweigh the potential benefits. The drug has been found to be embryotoxic and teratogenic in preclinical reproductive studies. Miscarriage is common and can occur for many reasons, but animal studies have suggested that leflunomide may increase the chance of birth defects.
Women treated with leflunomide are advised to avoid pregnancy. If pregnancy occurs, the exposure of the fetus to leflunomide should be reduced through a cholestyramine drug elimination procedure. Women who are planning to conceive should consult their doctor and ensure blood levels of the leflunomide metabolite are below <0.02 μg/ml before attempting to conceive. Due to the long half-life of the active metabolite, it is advised to undergo a drug elimination procedure with cholestyramine until blood levels are below the 0.02 μg/ml limit for at least 14 days.
It is recommended to wait at least two years after discontinuing leflunomide before attempting to conceive, as it can take this long for the drug to completely leave the body. In healthy adults, it takes around 10 weeks for most of the leflunomide to be eliminated from the body. However, for some individuals, it could persist in the body for up to two years.
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Frequently asked questions
It is not advisable to get vaccinated immediately after leflunomide. It is recommended to wait for at least 2 years after leflunomide before getting vaccinated.
Leflunomide is a disease-modifying anti-rheumatic drug (DMARD) used for rheumatoid arthritis and psoriatic arthritis. It reduces the amount of blood cells your body makes, which means you may pick up infections more frequently. Vaccines may not be as effective if administered immediately before or after leflunomide.
Live virus vaccines are not recommended while on leflunomide. However, if a vaccine needs to be administered within a certain time interval, it may be done, although lower vaccine effectiveness is expected. Always consult your doctor before getting vaccinated while on leflunomide.
Some common side effects of leflunomide include loose bowel motions, diarrhoea, and hair loss. More serious side effects include liver damage, high blood pressure, and harm to an unborn baby. Always consult your doctor if you experience any side effects while on leflunomide.
It is not recommended to take over-the-counter or herbal remedies without consulting your doctor while on leflunomide. Non-steroidal anti-inflammatory drugs (NSAIDs) and painkillers are generally safe to take with leflunomide, but always check with your doctor first.
