Interaction Checker

Orlistat interactions

Orlistat (Xenical, Alli) has 83 documented interactions across the FDA labels and fact sheets we index: 1 major, 80 moderate, 2 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.

Major interactions (1)

  • CyclosporineimmunosuppressantMajor

    Compounds that decrease cyclosporine absorption, such as orlistat, should be avoided. (Cyclosporine label, Drug interactions)

Moderate interactions (80)

  • AcarboseantidiabeticModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • AdapaleneretinoidModerate

    The effect of ORLISTAT on the absorption of supplemental vitamin D, vitamin A, and nutritionally-derived vitamin K is not known at this time [see Clinical Pharmacology (12.3) , and Warnings and Precautions (5.1) ] . (Orlistat label, Drug interactions)

  • AmiodaroneantiarrhythmicModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • ApixabananticoagulantModerate

    Anticoagulants including Warfarin Vitamin K absorption may be decreased with ORLISTAT. (Orlistat label, Drug interactions)

  • Bictegravir, emtricitabine, and tenofovir alafenamideantiretroviralModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • BrivaracetamanticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • Calcipotrienevitamin D analogModerate

    The effect of ORLISTAT on the absorption of supplemental vitamin D, vitamin A, and nutritionally-derived vitamin K is not known at this time [see Clinical Pharmacology (12.3) , and Warnings and Precautions (5.1) ] . (Orlistat label, Drug interactions)

  • Calcitriolvitamin D analogModerate

    The effect of ORLISTAT on the absorption of supplemental vitamin D, vitamin A, and nutritionally-derived vitamin K is not known at this time [see Clinical Pharmacology (12.3) , and Warnings and Precautions (5.1) ] . (Orlistat label, Drug interactions)

  • CanagliflozinSGLT2 inhibitorModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • Cannabidiol (prescription)anticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • CarbamazepineanticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • CenobamateanticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • ClobazambenzodiazepineModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • ClonazepambenzodiazepineModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • DabigatrananticoagulantModerate

    Anticoagulants including Warfarin Vitamin K absorption may be decreased with ORLISTAT. (Orlistat label, Drug interactions)

  • DapagliflozinSGLT2 inhibitorModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • Divalproex (valproate)anticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • DolutegravirantiretroviralModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • DulaglutideGLP-1 receptor agonistModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • EdoxabananticoagulantModerate

    Anticoagulants including Warfarin Vitamin K absorption may be decreased with ORLISTAT. (Orlistat label, Drug interactions)

  • EmpagliflozinSGLT2 inhibitorModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • Empagliflozin and metforminSGLT2 inhibitorModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • Emtricitabine and tenofovirantiretroviralModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • EnoxaparinanticoagulantModerate

    Anticoagulants including Warfarin Vitamin K absorption may be decreased with ORLISTAT. (Orlistat label, Drug interactions)

  • EslicarbazepineanticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • EthosuximideanticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • ExenatideGLP-1 receptor agonistModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • FelbamateanticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • FondaparinuxanticoagulantModerate

    Anticoagulants including Warfarin Vitamin K absorption may be decreased with ORLISTAT. (Orlistat label, Drug interactions)

  • GabapentinanticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • GlimepiridesulfonylureaModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • GlipizidesulfonylureaModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • GlyburidesulfonylureaModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • Glyburide and metforminsulfonylureaModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • HeparinanticoagulantModerate

    Anticoagulants including Warfarin Vitamin K absorption may be decreased with ORLISTAT. (Orlistat label, Drug interactions)

  • Insulin aspartinsulinModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • Insulin degludecinsulinModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • Insulin detemirinsulinModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • Insulin glargineinsulinModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • Insulin lisproinsulinModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • Insulin regular (human)insulinModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • IsotretinoinretinoidModerate

    The effect of ORLISTAT on the absorption of supplemental vitamin D, vitamin A, and nutritionally-derived vitamin K is not known at this time [see Clinical Pharmacology (12.3) , and Warnings and Precautions (5.1) ] . (Orlistat label, Drug interactions)

  • LacosamideanticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • LamotrigineanticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • LevetiracetamanticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • Levothyroxinethyroid hormoneModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • LinagliptinDPP-4 inhibitorModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • Liothyroninethyroid hormoneModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • LiraglutideGLP-1 receptor agonistModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • MetforminbiguanideModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • Methimazoleantithyroid drugModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • OxcarbazepineanticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • PerampanelanticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • PhenobarbitalbarbiturateModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • Phentermine and topiramateCNS stimulantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • PhenytoinanticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • Phytonadione (vitamin K1)vitamin KModerate

    The effect of ORLISTAT on the absorption of supplemental vitamin D, vitamin A, and nutritionally-derived vitamin K is not known at this time [see Clinical Pharmacology (12.3) , and Warnings and Precautions (5.1) ] . (Orlistat label, Drug interactions)

  • PioglitazonethiazolidinedioneModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • Pioglitazone and metforminthiazolidinedioneModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • PregabalinanticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • PrimidoneanticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • PropafenoneantiarrhythmicModerate

    • Orlistat may reduce propafenone concentrations. (Propafenone label, Drug interactions)

  • Propylthiouracilantithyroid drugModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • RepaglinidemeglitinideModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • RitonavirantiretroviralModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • RivaroxabananticoagulantModerate

    Anticoagulants including Warfarin Vitamin K absorption may be decreased with ORLISTAT. (Orlistat label, Drug interactions)

  • RufinamideanticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • SemaglutideGLP-1 receptor agonistModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • SitagliptinDPP-4 inhibitorModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • Sitagliptin and metforminDPP-4 inhibitorModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • TiagabineanticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • TirzepatideGLP-1 receptor agonistModerate

    A reduction in dose of oral hypoglycemic medication (e.g., sulfonylureas) or insulin may be required in some patients [see Clinical Studies (14) ] . (Orlistat label, Warnings and precautions)

  • TopiramateanticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • TretinoinretinoidModerate

    The effect of ORLISTAT on the absorption of supplemental vitamin D, vitamin A, and nutritionally-derived vitamin K is not known at this time [see Clinical Pharmacology (12.3) , and Warnings and Precautions (5.1) ] . (Orlistat label, Drug interactions)

  • Valproic acidanticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • VigabatrinanticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • Vitamin DVitamin and mineralModerate

    The effect of ORLISTAT on the absorption of supplemental vitamin D, vitamin A, and nutritionally-derived vitamin K is not known at this time [see Clinical Pharmacology (12.3) , and Warnings and Precautions (5.1) ] . (Orlistat label, Drug interactions)

  • Vitamin KVitamin and mineralModerate

    The effect of ORLISTAT on the absorption of supplemental vitamin D, vitamin A, and nutritionally-derived vitamin K is not known at this time [see Clinical Pharmacology (12.3) , and Warnings and Precautions (5.1) ] . (Orlistat label, Drug interactions)

  • WarfarinanticoagulantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

  • ZonisamideanticonvulsantModerate

    Drug Interactions and Decreased Vitamin Absorption ORLISTAT may interact with concomitant drugs including cyclosporine, levothyroxine, warfarin, amiodarone, antiepileptic drugs, and antiretroviral drugs [see Drug Interactions (7) ]. (Orlistat label, Warnings and precautions)

Minor mentions (2)

  • Nirmatrelvir and ritonavirantiviralMinor

    Antiretroviral Drugs Loss of virological control has been reported in HIV-infected patients taking orlistat concomitantly with antiretroviral drugs such as atazanavir, ritonavir, tenofovir disoproxil fumarate, emtricitabine, and with the combinations lopinavir/ritonavir and emtricitabine/efavirenz/tenofovir disoproxil fumarate. (Orlistat label, Drug interactions)

  • Vitamin EVitamin and mineralMinor

    ORLISTAT inhibited absorption of a vitamin E acetate supplement. (Orlistat label, Drug interactions)

Check Orlistat against everything you take. Add your full list; every pair is checked at once.

Open in the checker

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.