Leflunomide interactions
Leflunomide (Arava), an immunosuppressant has 88 documented interactions across the FDA labels and fact sheets we index: 8 major, 65 moderate, 14 minor, and 1 where a label reports no significant interaction. Each entry below quotes the sentence behind it. This drug page is a starting point, not a verdict for your situation.
Major interactions (8)
It is uncertain whether the occurrence of HSTCL is related to use of a TNF blocker or a TNF blocker in combination with these other immunosuppressants [see Warnings and Precautions (5.2) ] . (Adalimumab label, Boxed warning)
- CaptoprilACE inhibitorMajor
About 13 percent of the cases of neutropenia have ended fatally, but almost all fatalities were in patients with serious illness, having collagen vascular disease, renal failure, heart failure or immunosuppressant therapy, or a combination of these complicating factors. (Captopril label, Warnings)
- CyclosporineimmunosuppressantMajor
In kidney, liver, and heart transplant patients Neoral may be administered with other immunosuppressive agents. (Cyclosporine label, Boxed warning)
- FludrocortisonecorticosteroidMajor
Chicken pox and measles, for example, can have a more serious or even fatal course in children on immunosuppressant corticosteroids. (Fludrocortisone label, Warnings)
Immunosuppressants Everolimus Sirolimus Temsirolimus (IV) Not recommended during and 2 weeks after TOLSURA treatment. (Itraconazole label, Drug interactions)
…IN TRANSPLANT PATIENTS; AND INCREASED MORTALITY IN FEMALE LIVER TRANSPLANT PATIENTS • Increased risk for developing serious infections and malignancies with ASTAGRAF XL ® or other immunosuppressants that may lead to hospitalization or death. [see Warnings and Precautions ( 5.1 , 5.2 )] • Increased mortality in female liver transplant patients with ASTAGRAF XL. (Tacrolimus label, Boxed warning)
- TeriflunomideimmunosuppressantMajor
Patients being treated with teriflunomide [see Drug Interactions (7) ] . (Leflunomide label, Contraindications)
Moderate interactions (65)
- AbataceptimmunosuppressantModerate
If used with concomitant methotrexate and/or other potential immunosuppressive agents, chronic monitoring should be monthly. (Leflunomide label, Warnings and precautions)
In patients taking ARAVA, exposure of drugs metabolized by CYP1A2 (e.g., alosetron, duloxetine, theophylline, tizanidine) may be reduced. (Leflunomide label, Drug interactions)
- AlosetronModerate
In patients taking ARAVA, exposure of drugs metabolized by CYP1A2 (e.g., alosetron, duloxetine, theophylline, tizanidine) may be reduced. (Leflunomide label, Drug interactions)
- Amlodipinedihydropyridine calcium channel blockerModerate
Immunosuppressants Amlodipine may increase the systemic exposure of cyclosporine or tacrolimus when co-administered. (Amlodipine label, Drug interactions)
- Amoxicillinpenicillin antibioticModerate
In patients taking ARAVA, exposure of drugs which are OAT3 substrates (e.g., cefaclor, cimetidine, ciprofloxacin, penicillin G, ketoprofen, furosemide, methotrexate, zidovudine) may be increased. (Leflunomide label, Drug interactions)
- Amoxicillin and clavulanatepenicillin antibioticModerate
In patients taking ARAVA, exposure of drugs which are OAT3 substrates (e.g., cefaclor, cimetidine, ciprofloxacin, penicillin G, ketoprofen, furosemide, methotrexate, zidovudine) may be increased. (Leflunomide label, Drug interactions)
- Ampicillinpenicillin antibioticModerate
In patients taking ARAVA, exposure of drugs which are OAT3 substrates (e.g., cefaclor, cimetidine, ciprofloxacin, penicillin G, ketoprofen, furosemide, methotrexate, zidovudine) may be increased. (Leflunomide label, Drug interactions)
- AtorvastatinstatinModerate
For other substrates of BCRP (e.g., mitoxantrone) and drugs in the OATP family (e.g., methotrexate, rifampin), especially HMG-Co reductase inhibitors (e.g., atorvastatin, nateglinide, pravastatin, repaglinide, and simvastatin), consider reducing the dose of these drugs and monitor patients closely for signs and symptoms of increased exposures to the drugs while… (Leflunomide label, Drug interactions)
- AzathioprineimmunosuppressantModerate
If used with concomitant methotrexate and/or other potential immunosuppressive agents, chronic monitoring should be monthly. (Leflunomide label, Warnings and precautions)
- Butalbital, acetaminophen, and caffeinebarbiturateModerate
In patients taking ARAVA, exposure of drugs metabolized by CYP1A2 (e.g., alosetron, duloxetine, theophylline, tizanidine) may be reduced. (Leflunomide label, Drug interactions)
- CimetidineH2 blockerModerate
In patients taking ARAVA, exposure of drugs which are OAT3 substrates (e.g., cefaclor, cimetidine, ciprofloxacin, penicillin G, ketoprofen, furosemide, methotrexate, zidovudine) may be increased. (Leflunomide label, Drug interactions)
- CiprofloxacinfluoroquinoloneModerate
In patients taking ARAVA, exposure of drugs which are OAT3 substrates (e.g., cefaclor, cimetidine, ciprofloxacin, penicillin G, ketoprofen, furosemide, methotrexate, zidovudine) may be increased. (Leflunomide label, Drug interactions)
- Conjugated estrogensestrogenModerate
Effect on Oral Contraceptives Teriflunomide may increase the systemic exposures of ethinylestradiol and levonorgestrel. (Leflunomide label, Drug interactions)
- DenosumabModerate
Other risk factors for the development of ONJ include immunosuppressive therapy, treatment with angiogenesis inhibitors, systemic corticosteroids, diabetes, and gingival infections. (Denosumab label, Warnings and precautions)
- Dicloxacillinpenicillin antibioticModerate
In patients taking ARAVA, exposure of drugs which are OAT3 substrates (e.g., cefaclor, cimetidine, ciprofloxacin, penicillin G, ketoprofen, furosemide, methotrexate, zidovudine) may be increased. (Leflunomide label, Drug interactions)
- Dimethyl fumarateimmunosuppressantModerate
If used with concomitant methotrexate and/or other potential immunosuppressive agents, chronic monitoring should be monthly. (Leflunomide label, Warnings and precautions)
- Drospirenone and ethinyl estradioloral contraceptiveModerate
Effect on Oral Contraceptives Teriflunomide may increase the systemic exposures of ethinylestradiol and levonorgestrel. (Leflunomide label, Drug interactions)
- DuloxetineSNRIModerate
In patients taking ARAVA, exposure of drugs metabolized by CYP1A2 (e.g., alosetron, duloxetine, theophylline, tizanidine) may be reduced. (Leflunomide label, Drug interactions)
- EstradiolestrogenModerate
Effect on Oral Contraceptives Teriflunomide may increase the systemic exposures of ethinylestradiol and levonorgestrel. (Leflunomide label, Drug interactions)
- EtanerceptimmunosuppressantModerate
If used with concomitant methotrexate and/or other potential immunosuppressive agents, chronic monitoring should be monthly. (Leflunomide label, Warnings and precautions)
- EverolimusimmunosuppressantModerate
If used with concomitant methotrexate and/or other potential immunosuppressive agents, chronic monitoring should be monthly. (Leflunomide label, Warnings and precautions)
- Ezetimibe and simvastatinstatinModerate
…(e.g., mitoxantrone) and drugs in the OATP family (e.g., methotrexate, rifampin), especially HMG-Co reductase inhibitors (e.g., atorvastatin, nateglinide, pravastatin, repaglinide, and simvastatin), consider reducing the dose of these drugs and monitor patients closely for signs and symptoms of increased exposures to the drugs while patients are taking ARAVA [see… (Leflunomide label, Drug interactions)
- Febuxostatxanthine oxidase inhibitorModerate
In patients taking ARAVA, exposure of drugs metabolized by CYP1A2 (e.g., alosetron, duloxetine, theophylline, tizanidine) may be reduced. (Leflunomide label, Drug interactions)
- FenofibratefibrateModerate
Immunosuppressants Clinical Impact: Immunosuppressants such as cyclosporine and tacrolimus can produce nephrotoxicity with decreases in creatinine clearance and rises in serum creatinine, and because renal excretion is the primary elimination route of fibrate drugs including fenofibrate, there is a risk that an interaction will lead to deterioration of renal… (Fenofibrate label, Drug interactions)
- FingolimodimmunosuppressantModerate
If used with concomitant methotrexate and/or other potential immunosuppressive agents, chronic monitoring should be monthly. (Leflunomide label, Warnings and precautions)
- Furosemideloop diureticModerate
In patients taking ARAVA, exposure of drugs which are OAT3 substrates (e.g., cefaclor, cimetidine, ciprofloxacin, penicillin G, ketoprofen, furosemide, methotrexate, zidovudine) may be increased. (Leflunomide label, Drug interactions)
- GuselkumabimmunosuppressantModerate
If used with concomitant methotrexate and/or other potential immunosuppressive agents, chronic monitoring should be monthly. (Leflunomide label, Warnings and precautions)
- InfliximabimmunosuppressantModerate
If used with concomitant methotrexate and/or other potential immunosuppressive agents, chronic monitoring should be monthly. (Leflunomide label, Warnings and precautions)
- Ketoconazoleazole antifungalModerate
Immunosuppressants everolimus, rapamycin (also known as sirolimus), temsirolimus budesonide, ciclesonide, cyclosporine, dexamethasone, fluticasone, methylprednisolone, tacrolimus Rapamycin (sirolimus): Ketoconazole tablets 200 mg daily for 10 days increased the C max and AUC of a single 5 mg dose of sirolimus by 4.3 fold and 10.9 fold, respectively in 23 healthy… (Ketoconazole label, Drug interactions)
- LevonorgestrelprogestinModerate
Teriflunomide may increase exposure of ethinylestradiol and levonorgestrel. (Leflunomide label, Drug interactions)
- Levonorgestrel and ethinyl estradioloral contraceptiveModerate
Teriflunomide may increase exposure of ethinylestradiol and levonorgestrel. (Leflunomide label, Drug interactions)
- MedroxyprogesteroneprogestinModerate
Effect on Oral Contraceptives Teriflunomide may increase the systemic exposures of ethinylestradiol and levonorgestrel. (Leflunomide label, Drug interactions)
- MegestrolprogestinModerate
Effect on Oral Contraceptives Teriflunomide may increase the systemic exposures of ethinylestradiol and levonorgestrel. (Leflunomide label, Drug interactions)
- MethotrexateimmunosuppressantModerate
If ARAVA and methotrexate are given concomitantly, follow the American College of Rheumatology (ACR) guidelines for monitoring methotrexate liver toxicity with ALT, AST, and serum albumin testing. (Leflunomide label, Warnings and precautions)
- MycophenolateimmunosuppressantModerate
If used with concomitant methotrexate and/or other potential immunosuppressive agents, chronic monitoring should be monthly. (Leflunomide label, Warnings and precautions)
- NatalizumabimmunosuppressantModerate
If used with concomitant methotrexate and/or other potential immunosuppressive agents, chronic monitoring should be monthly. (Leflunomide label, Warnings and precautions)
- NorethindroneprogestinModerate
Effect on Oral Contraceptives Teriflunomide may increase the systemic exposures of ethinylestradiol and levonorgestrel. (Leflunomide label, Drug interactions)
- Norethindrone and ethinyl estradioloral contraceptiveModerate
Effect on Oral Contraceptives Teriflunomide may increase the systemic exposures of ethinylestradiol and levonorgestrel. (Leflunomide label, Drug interactions)
- Norgestimate and ethinyl estradioloral contraceptiveModerate
Effect on Oral Contraceptives Teriflunomide may increase the systemic exposures of ethinylestradiol and levonorgestrel. (Leflunomide label, Drug interactions)
- OcrelizumabimmunosuppressantModerate
If used with concomitant methotrexate and/or other potential immunosuppressive agents, chronic monitoring should be monthly. (Leflunomide label, Warnings and precautions)
- Penicillin Gpenicillin antibioticModerate
In patients taking ARAVA, exposure of drugs which are OAT3 substrates (e.g., cefaclor, cimetidine, ciprofloxacin, penicillin G, ketoprofen, furosemide, methotrexate, zidovudine) may be increased. (Leflunomide label, Drug interactions)
- Penicillin Vpenicillin antibioticModerate
In patients taking ARAVA, exposure of drugs which are OAT3 substrates (e.g., cefaclor, cimetidine, ciprofloxacin, penicillin G, ketoprofen, furosemide, methotrexate, zidovudine) may be increased. (Leflunomide label, Drug interactions)
- PentoxifyllinemethylxanthineModerate
In patients taking ARAVA, exposure of drugs metabolized by CYP1A2 (e.g., alosetron, duloxetine, theophylline, tizanidine) may be reduced. (Leflunomide label, Drug interactions)
- Pimecrolimuscalcineurin inhibitorModerate
If used with concomitant methotrexate and/or other potential immunosuppressive agents, chronic monitoring should be monthly. (Leflunomide label, Warnings and precautions)
- PioglitazonethiazolidinedioneModerate
In patients taking ARAVA, exposure of drugs metabolized by CYP2C8 (e.g., paclitaxel, pioglitazone, repaglinide, rosiglitazone) may be increased. (Leflunomide label, Drug interactions)
- Pioglitazone and metforminthiazolidinedioneModerate
In patients taking ARAVA, exposure of drugs metabolized by CYP2C8 (e.g., paclitaxel, pioglitazone, repaglinide, rosiglitazone) may be increased. (Leflunomide label, Drug interactions)
- PravastatinstatinModerate
…other substrates of BCRP (e.g., mitoxantrone) and drugs in the OATP family (e.g., methotrexate, rifampin), especially HMG-Co reductase inhibitors (e.g., atorvastatin, nateglinide, pravastatin, repaglinide, and simvastatin), consider reducing the dose of these drugs and monitor patients closely for signs and symptoms of increased exposures to the drugs while patients… (Leflunomide label, Drug interactions)
- ProgesteroneprogestinModerate
Effect on Oral Contraceptives Teriflunomide may increase the systemic exposures of ethinylestradiol and levonorgestrel. (Leflunomide label, Drug interactions)
- RepaglinidemeglitinideModerate
In patients taking ARAVA, exposure of drugs metabolized by CYP2C8 (e.g., paclitaxel, pioglitazone, repaglinide, rosiglitazone) may be increased. (Leflunomide label, Drug interactions)
- RifampinantibioticModerate
Concomitant use of ARAVA and rifampin, a potent inducer of CYP and transporters, increased the plasma concentration of teriflunomide by 40%. (Leflunomide label, Drug interactions)
- RituximabimmunosuppressantModerate
If used with concomitant methotrexate and/or other potential immunosuppressive agents, chronic monitoring should be monthly. (Leflunomide label, Warnings and precautions)
- RosuvastatinstatinModerate
Rosuvastatin: The dose of rosuvastatin should not exceed 10 mg once daily in patients taking ARAVA. (Leflunomide label, Drug interactions)
- SecukinumabimmunosuppressantModerate
If used with concomitant methotrexate and/or other potential immunosuppressive agents, chronic monitoring should be monthly. (Leflunomide label, Warnings and precautions)
- SimvastatinstatinModerate
…(e.g., mitoxantrone) and drugs in the OATP family (e.g., methotrexate, rifampin), especially HMG-Co reductase inhibitors (e.g., atorvastatin, nateglinide, pravastatin, repaglinide, and simvastatin), consider reducing the dose of these drugs and monitor patients closely for signs and symptoms of increased exposures to the drugs while patients are taking ARAVA [see… (Leflunomide label, Drug interactions)
- SirolimusimmunosuppressantModerate
If used with concomitant methotrexate and/or other potential immunosuppressive agents, chronic monitoring should be monthly. (Leflunomide label, Warnings and precautions)
- Sofosbuvir and velpatasvirantiviralModerate
HBV reactivation has also been reported in patients receiving certain immunosuppressant or chemotherapeutic agents; the risk of HBV reactivation associated with treatment with HCV direct-acting antivirals may be increased in these patients. (Sofosbuvir and velpatasvir label, Warnings and precautions)
- TheophyllinemethylxanthineModerate
In patients taking ARAVA, exposure of drugs metabolized by CYP1A2 (e.g., alosetron, duloxetine, theophylline, tizanidine) may be reduced. (Leflunomide label, Drug interactions)
- TinidazoleantibioticModerate
Cyclosporine, tacrolimus: Monitor for toxicities of these immunosuppressive drugs ( 7.1 ) (Tinidazole label, Drug interactions)
- Tizanidinemuscle relaxantModerate
In patients taking ARAVA, exposure of drugs metabolized by CYP1A2 (e.g., alosetron, duloxetine, theophylline, tizanidine) may be reduced. (Leflunomide label, Drug interactions)
- TocilizumabimmunosuppressantModerate
If used with concomitant methotrexate and/or other potential immunosuppressive agents, chronic monitoring should be monthly. (Leflunomide label, Warnings and precautions)
- TofacitinibimmunosuppressantModerate
If used with concomitant methotrexate and/or other potential immunosuppressive agents, chronic monitoring should be monthly. (Leflunomide label, Warnings and precautions)
- UpadacitinibimmunosuppressantModerate
If used with concomitant methotrexate and/or other potential immunosuppressive agents, chronic monitoring should be monthly. (Leflunomide label, Warnings and precautions)
- UstekinumabimmunosuppressantModerate
If used with concomitant methotrexate and/or other potential immunosuppressive agents, chronic monitoring should be monthly. (Leflunomide label, Warnings and precautions)
- WarfarinanticoagulantModerate
Warfarin: Monitor INR as teriflunomide may decrease INR. (Leflunomide label, Drug interactions)
Minor mentions (14)
- Cannabidiol (prescription)anticonvulsantMinor
Effect on CYP2C8 Substrates Teriflunomide is an inhibitor of CYP2C8 in vivo . (Leflunomide label, Drug interactions)
- CarbamazepineanticonvulsantMinor
Effect on CYP1A2 Substrates Teriflunomide, the active metabolite of ARAVA, may be a weak inducer of CYP1A2 in vivo . (Leflunomide label, Drug interactions)
- Cholestyraminebile acid sequestrantMinor
Elimination can be accelerated by the following procedures: Administer cholestyramine 8 grams orally 3 times daily for 11 days. (Leflunomide label, Warnings and precautions)
- Deferasiroxiron supplementMinor
Effect on CYP2C8 Substrates Teriflunomide is an inhibitor of CYP2C8 in vivo . (Leflunomide label, Drug interactions)
- FluvastatinstatinMinor
IMNM is characterized by proximal muscle weakness and elevated serum CK, which persist despite discontinuation of statin treatment; positive anti-HMG CoA reductase antibody, muscle biopsy showing necrotizing myopathy, and improvement with immunosuppressive agents. (Fluvastatin label, Warnings and precautions)
- GemfibrozilfibrateMinor
Effect on CYP2C8 Substrates Teriflunomide is an inhibitor of CYP2C8 in vivo . (Leflunomide label, Drug interactions)
- LovastatinstatinMinor
IMNM is characterized by: proximal muscle weakness and elevated serum creatine kinase, which persist despite discontinuation of statin treatment; positive anti-HMG CoA reductase antibody; muscle biopsy showing necrotizing myopathy; and improvement with immunosuppressive agents. (Lovastatin label, Warnings)
- Methimazoleantithyroid drugMinor
In some cases, vasculitis resolved/improved with drug discontinuation; however, more severe cases required treatment with additional measures including corticosteroids, immunosuppressant therapy, and plasmapheresis. (Methimazole label, Warnings)
- PerampanelanticonvulsantMinor
Effect on CYP2C8 Substrates Teriflunomide is an inhibitor of CYP2C8 in vivo . (Leflunomide label, Drug interactions)
- PitavastatinstatinMinor
IMNM is characterized by proximal muscle weakness and elevated serum creatine kinase that persist despite discontinuation of statin treatment; positive anti-HMG CoA reductase antibody; muscle biopsy showing necrotizing myopathy; and improvement with immunosuppressive agents. (Pitavastatin label, Warnings and precautions)
- Posaconazoleazole antifungalMinor
CYP3A Substrates Immunosuppressants that are CYP3A4 Substrates Mechanism and Clinical Effect(s) Posaconazole is a strong CYP3A4 inhibitor. (Posaconazole label, Drug interactions)
- Propylthiouracilantithyroid drugMinor
In some cases, vasculitis resolved/improved with drug discontinuation; however, more severe cases required treatment with additional measures including corticosteroids, immunosuppressant therapy, and plasmapheresis. (Propylthiouracil label, Warnings)
- Sulfamethoxazole and trimethoprimsulfonamideMinor
Effect on CYP2C8 Substrates Teriflunomide is an inhibitor of CYP2C8 in vivo . (Leflunomide label, Drug interactions)
- TrimethoprimantibioticMinor
Effect on CYP2C8 Substrates Teriflunomide is an inhibitor of CYP2C8 in vivo . (Leflunomide label, Drug interactions)
No significant interaction reported (1)
- Clarithromycinmacrolide antibioticNo interaction
…Repaglinide, Rosiglitazone: [See Warnings and Precautions ( 5.4 ) and Adverse Reactions ( 6.2 )] Insulin Insulin: [See Warnings and Precautions ( 5.4 ) and Adverse Reactions ( 6.2 )] Immunosuppressants: Cyclosporine Use With Caution Cyclosporine: There have been spontaneous or published reports of CYP3A based interactions of clarithromycin with cyclosporine. (Clarithromycin label, Drug interactions)
Check Leflunomide against everything you take. Add your full list; every pair is checked at once.
Open in the checkerNot medical advice. Severity reflects the label's wording, not your circumstances. A "major" flag can be routine under supervision and a "minor" one can matter at high doses. Ask a pharmacist.