Ritlecitinib interactions

Ritlecitinib (Litfulo), a JAK inhibitor has 116 documented interactions across the FDA labels and fact sheets we index: 50 major, 25 moderate, 41 minor, and 0 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.

Interactions from the label

Major interactions (50)

  • AbataceptimmunosuppressantMajor

    Additionally, concomitant use of ORENCIA with other biologic RA/PsA therapy or JAK inhibitors is not recommended. (Abatacept label, Warnings and precautions)

  • AbrocitinibJAK inhibitorMajor

    • Higher rate of all-cause mortality, including sudden cardiovascular death with another Janus kinase inhibitor (JAK) vs. TNF blockers in rheumatoid arthritis (RA) patients. (Ritlecitinib label, Boxed warning)

  • AdalimumabimmunosuppressantMajor

    • Higher rate of all-cause mortality, including sudden cardiovascular death with another Janus kinase inhibitor (JAK) vs. TNF blockers in rheumatoid arthritis (RA) patients. (Ritlecitinib label, Boxed warning)

  • AprepitantCYP3A4 inhibitorMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • ArmodafinilCNS stimulantMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • BaricitinibJAK inhibitorMajor

    • Higher rate of all-cause mortality, including sudden cardiovascular death with another Janus kinase inhibitor (JAK) vs. TNF blockers in rheumatoid arthritis (RA) patients. (Ritlecitinib label, Boxed warning)

  • BosentanCYP3A4 inducerMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • 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)

  • CarbamazepineanticonvulsantMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • CenobamateanticonvulsantMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • CladribineantimetaboliteMajor

    Prevention or Management Concomitant use with myelosuppressive or other immunosuppressive drugs is not recommended. (Cladribine label, Drug interactions)

  • ClobazambenzodiazepineMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • CyclosporineimmunosuppressantMajor

    In kidney, liver, and heart transplant patients Neoral may be administered with other immunosuppressive agents. (Cyclosporine label, Boxed warning)

  • DarunavirantiretroviralMajor

    Immunosuppressant/neoplastic: everolimus Co-administration of everolimus and PREZISTA/ritonavir is not recommended. irinotecan Discontinue PREZISTA/ritonavir at least 1 week prior to starting irinotecan therapy. (Darunavir label, Drug interactions)

  • Deferasiroxiron supplementMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • DexamethasonecorticosteroidMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • EfavirenzantiretroviralMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • EslicarbazepineanticonvulsantMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • EtanerceptimmunosuppressantMajor

    • Higher rate of all-cause mortality, including sudden cardiovascular death with another Janus kinase inhibitor (JAK) vs. TNF blockers in rheumatoid arthritis (RA) patients. (Ritlecitinib label, Boxed warning)

  • EtravirineantiretroviralMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • FludrocortisonecorticosteroidMajor

    Chicken pox and measles, for example, can have a more serious or even fatal course in children on immunosuppressant corticosteroids. (Fludrocortisone label, Warnings)

  • FlunisolidecorticosteroidMajor

    Persons who are on immunosuppressant doses of corticosteroids should be warned to avoid exposure to chickenpox or measles. (Flunisolide label, Precautions)

  • FosphenytoinanticonvulsantMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • GriseofulvinantifungalMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • InfliximabimmunosuppressantMajor

    • Higher rate of all-cause mortality, including sudden cardiovascular death with another Janus kinase inhibitor (JAK) vs. TNF blockers in rheumatoid arthritis (RA) patients. (Ritlecitinib label, Boxed warning)

  • Itraconazoleazole antifungalMajor

    Immunosuppressants Everolimus Sirolimus Temsirolimus (IV) Not recommended during and 2 weeks after TOLSURA treatment. (Itraconazole label, Drug interactions)

  • Lopinavir and ritonavirantiretroviralMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • LorlatinibCYP3A4 inducerMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • MitapivatCYP3A4 inducerMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • MitotaneCYP3A4 inducerMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • ModafinilCNS stimulantMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • Nafcillinpenicillin antibioticMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • NevirapineantiretroviralMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • …methylergonovine • HMG-CoA reductase inhibitors: lovastatin, simvastatin (these drugs can be temporarily discontinued to allow PAXLOVID use [see Table 2 , Drug Interactions (7.3) ] ) • Immunosuppressants: voclosporin • Microsomal triglyceride transfer protein inhibitor: lomitapide • Migraine medications: eletriptan, ubrogepant • Mineralocorticoid receptor antagonists:… (Nirmatrelvir and ritonavir label, Contraindications)

  • OxcarbazepineanticonvulsantMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • PhenobarbitalbarbiturateMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • Phentermine and topiramateCNS stimulantMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • PhenytoinanticonvulsantMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • PrimidoneanticonvulsantMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • RifabutinantibioticMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • RifampinantibioticMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • RifapentineantibioticMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • RitonavirantiretroviralMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • RuxolitinibJAK inhibitorMajor

    • Higher rate of all-cause mortality, including sudden cardiovascular death with another Janus kinase inhibitor (JAK) vs. TNF blockers in rheumatoid arthritis (RA) patients. (Ritlecitinib label, Boxed warning)

  • SuzetrigineCYP3A4 inducerMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • TacrolimusimmunosuppressantMajor

    …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)

  • TofacitinibimmunosuppressantMajor

    • Higher rate of all-cause mortality, including sudden cardiovascular death with another Janus kinase inhibitor (JAK) vs. TNF blockers in rheumatoid arthritis (RA) patients. (Ritlecitinib label, Boxed warning)

  • TopiramateanticonvulsantMajor

    • Certain CYP3A inducers: Coadministration with strong inducers of CYP3A is not recommended. (Ritlecitinib label, Drug interactions)

  • UpadacitinibimmunosuppressantMajor

    • Higher rate of all-cause mortality, including sudden cardiovascular death with another Janus kinase inhibitor (JAK) vs. TNF blockers in rheumatoid arthritis (RA) patients. (Ritlecitinib label, Boxed warning)

Moderate interactions (25)

  • Amlodipinedihydropyridine calcium channel blockerModerate

    Immunosuppressants Amlodipine may increase the systemic exposure of cyclosporine or tacrolimus when co-administered. (Amlodipine label, Drug interactions)

  • Amlodipine and atorvastatindihydropyridine calcium channel blockerModerate

    Impact of Amlodipine on Other Drugs Immunosuppressants Amlodipine may increase the systemic exposure of cyclosporine or tacrolimus when co-administered. (Amlodipine and atorvastatin label, Drug interactions)

  • Amlodipine and olmesartandihydropyridine calcium channel blockerModerate

    Immunosuppressants: Amlodipine may increase the systemic exposure of cyclosporine or tacrolimus when co-administered. (Amlodipine and olmesartan label, Drug interactions)

  • Amlodipine and valsartandihydropyridine calcium channel blockerModerate

    Immunosuppressants Amlodipine may increase the systemic exposure of cyclosporine or tacrolimus when coadministered. (Amlodipine and valsartan label, Drug interactions)

  • AtazanavirantiretroviralModerate

    Immunosuppressants: cyclosporine, sirolimus, tacrolimus ↑ immunosuppressants Therapeutic concentration monitoring is recommended for these immunosuppressants when coadministered with REYATAZ. (Atazanavir label, Drug interactions)

  • BendamustineModerate

    Consider discontinuation or reduction of any concomitant chemotherapy or immunosuppressive therapy in patients who develop PML. (Bendamustine label, Warnings and precautions)

  • Darunavir and cobicistatantiretroviralModerate

    Therapeutic drug monitoring is recommended with concomitant use Immunosuppressant /neoplastic: everolimus ↑ immunosuppressants Co-administration of everolimus and PREZCOBIX or PREZCOBIX PED is not recommended. irinotecan Discontinue PREZCOBIX or PREZCOBIX PED at least 1 week prior to starting irinotecan therapy. (Darunavir and cobicistat 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)

  • Immuno-suppressants: e.g., cyclosporine (CsA) sirolimus tacrolimus ↑ immuno-suppressants ↑ elvitegravir (with CsA) ↑ cobicistat (with CsA) Therapeutic monitoring of the immunosuppressive agents is recommended upon coadministration with GENVOYA. (Elvitegravir, cobicistat, emtricitabine, and tenofovir 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)

  • Fenofibric acidfibrateModerate

    Frequent PT/INR determinations are advisable until it has been definitely determined that the PT/INR has stabilized 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… (Fenofibric acid label, Drug interactions)

  • FosamprenavirantiretroviralModerate

    Immunosuppressants: Cyclosporine, tacrolimus, sirolimus ↑ Immunosuppressants Therapeutic concentration monitoring is recommended for immunosuppressant agents. (Fosamprenavir label, Drug interactions)

  • 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)

  • Ledipasvir and sofosbuvirantiviralModerate

    HBV reactivation has also been reported in patients receiving certain immunosuppressants or chemotherapeutic agents; the risk of HBV reactivation associated with treatment with HCV direct-acting antivirals may be increased in these patients. (Ledipasvir and sofosbuvir label, Warnings and precautions)

  • LeflunomideimmunosuppressantModerate

    If used with concomitant methotrexate and/or other potential immunosuppressive agents, chronic monitoring should be monthly. (Leflunomide label, Warnings and precautions)

  • MercaptopurineantimetaboliteModerate

    A treatment regimen containing multiple immunosuppressants (including thiopurines) should therefore be used with caution as this could lead to lymphoproliferative disorders, some with reported fatalities. (Mercaptopurine label, Warnings and precautions)

  • MycophenolateimmunosuppressantModerate

    Lymphoma and Other Malignancies Patients receiving immunosuppressants, including mycophenolate mofetil, are at increased risk of developing lymphomas and other malignancies, particularly of the skin [see Adverse Reactions ( 6.1 )]. (Mycophenolate label, Warnings and precautions)

  • NefazodoneantidepressantModerate

    Immunosuppressive Agents There have been reports of increased blood concentrations of cyclosporine and tacrolimus into toxic ranges when patients received these drugs concomitantly with nefazodone. (Nefazodone label, Drug interactions)

  • Olmesartan, amlodipine, and hydrochlorothiazideangiotensin II receptor blocker (ARB)Moderate

    Immunosuppressants: Amlodipine may increase the systemic exposure of cyclosporine or tacrolimus when co-administered. (Olmesartan, amlodipine, and hydrochlorothiazide label, Drug interactions)

  • Treatment has consisted of high doses of corticosteroids alone or, in some cases, concomitantly with an immunosuppressant. (Penicillamine label, Warnings)

  • 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)

  • Telmisartan and amlodipineangiotensin II receptor blocker (ARB)Moderate

    Immunosuppressants: Amlodipine may increase the systemic exposure of cyclosporine or tacrolimus when co-administered. (Telmisartan and amlodipine label, Drug interactions)

  • TemsirolimusModerate

    Prophylaxis of PJP should be considered when concomitant use of corticosteroids or other immunosuppressive agents are required. (Temsirolimus label, Warnings and precautions)

  • TinidazoleantibioticModerate

    Cyclosporine, tacrolimus: Monitor for toxicities of these immunosuppressive drugs ( 7.1 ) (Tinidazole label, Drug interactions)

  • Tobacco and smokingTobacco and cannabisModerate

    In this study, current or past smokers had an additional increased risk of overall malignancies. (Ritlecitinib label, Warnings and precautions)

Minor mentions (41)

  • AmiodaroneantiarrhythmicMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib label, Drug interactions)

  • AtorvastatinstatinMinor

    IMNM is characterized by proximal muscle weakness and elevated serum creatine kinase that persists despite discontinuation of statin treatment; positive anti-HMG CoA reductase antibody; muscle biopsy showing necrotizing myopathy; and improvement with immunosuppressive agents. (Atorvastatin label, Warnings and precautions)

  • Thirty-four patients were treated with corticosteroids and one patient was treated with a non-steroidal immunosuppressant. (Axitinib label, Warnings and precautions)

  • Cannabidiol (prescription)anticonvulsantMinor

    CYP1A2 Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP1A2 inhibitor. (Ritlecitinib label, Drug interactions)

  • CimetidineH2 blockerMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib label, Drug interactions)

  • CiprofloxacinfluoroquinoloneMinor

    CYP1A2 Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP1A2 inhibitor. (Ritlecitinib label, Drug interactions)

  • Clarithromycinmacrolide antibioticMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib label, Drug interactions)

  • Diltiazemcalcium channel blockerMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib label, Drug interactions)

  • DronedaroneantiarrhythmicMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib label, Drug interactions)

  • Erythromycinmacrolide antibioticMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib label, Drug interactions)

  • EverolimusimmunosuppressantMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib label, Drug interactions)

  • 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 without significant inflammation; and improvement with immunosuppressive agents. (Ezetimibe and simvastatin label, Warnings and precautions)

  • Fluconazoleazole antifungalMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib 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)

  • FluvoxamineSSRIMinor

    CYP1A2 Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP1A2 inhibitor. (Ritlecitinib label, Drug interactions)

  • FosaprepitantCYP3A4 inhibitorMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib label, Drug interactions)

  • ImatinibCYP3A4 inhibitorMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib label, Drug interactions)

  • IsoniazidantibioticMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib label, Drug interactions)

  • IvacaftorCYP3A4 inhibitorMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib label, Drug interactions)

  • LenacapavirantiretroviralMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib 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)

  • MexiletineantiarrhythmicMinor

    CYP1A2 Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP1A2 inhibitor. (Ritlecitinib label, Drug interactions)

  • MifepristoneCYP3A4 inhibitorMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib label, Drug interactions)

  • Mirabegronbeta-adrenergic agonistMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib label, Drug interactions)

  • Nifedipinedihydropyridine calcium channel blockerMinor

    Immunosuppressive Drugs Tacrolimus: Tacrolimus has been shown to be metabolized via the CYP3A system. (Nifedipine label, Precautions)

  • PalbociclibCYP3A4 inhibitorMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib label, Drug interactions)

  • PerampanelanticonvulsantMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib 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

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib label, Drug interactions)

  • PravastatinstatinMinor

    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. (Pravastatin label, Warnings and precautions)

  • 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)

  • RanolazineQT-prolonging drugMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib label, Drug interactions)

  • RosuvastatinstatinMinor

    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. (Rosuvastatin label, Warnings and precautions)

  • SimvastatinstatinMinor

    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 without significant inflammation; and improvement with immunosuppressive agents. (Simvastatin label, Warnings and precautions)

  • Suvorexantsedative-hypnoticMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib label, Drug interactions)

  • Ticagrelorantiplatelet agentMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib label, Drug interactions)

  • Verapamilcalcium channel blockerMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib label, Drug interactions)

  • Viloxazinenorepinephrine reuptake inhibitorMinor

    CYP1A2 Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP1A2 inhibitor. (Ritlecitinib label, Drug interactions)

  • Voriconazoleazole antifungalMinor

    Clinically Significant Interactions Affecting Other Drugs CYP3A Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP3A inhibitor. (Ritlecitinib label, Drug interactions)

  • ZileutonCYP1A2 inhibitorMinor

    CYP1A2 Substrates Where Small Concentration Changes May Lead to Serious Adverse Reactions Clinical Impact Ritlecitinib is a CYP1A2 inhibitor. (Ritlecitinib label, Drug interactions)

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Not 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.