Acenocoumarol
Levothyroxine may increase the anticoagulant activities of Acenocoumarol.
Afatinib
The serum concentration of Afatinib can be decreased when it is combined with Levothyroxine.
Aluminum Hydroxide
The serum concentration of Levothyroxine can be decreased when it is combined with Aluminum hydroxide.
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aluminum hydroxide, dried (USP)
The serum concentration of Levothyroxine can be decreased when it is combined with Aluminum hydroxide.
AMBROXOL ACEFYLLINATE
The metabolism of Ambroxol acefyllinate can be increased when combined with Levothyroxine.
Ambroxol-Theophylline-7-Acetate
The metabolism of Ambroxol acefyllinate can be increased when combined with Levothyroxine.
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Amineptin
Levothyroxine may increase the arrhythmogenic activities of Amineptine.
Aminophylline
The metabolism of Aminophylline can be increased when combined with Levothyroxine.
Amiodarone
The metabolism of Levothyroxine can be decreased when combined with Amiodarone.
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Amitriptyline
Levothyroxine may increase the arrhythmogenic activities of Amitriptyline.
Amodiaquine
The serum concentration of Amodiaquine can be increased when it is combined with Levothyroxine.
Amoxapine
Levothyroxine may increase the arrhythmogenic activities of Amoxapine.
Apalutamide
The serum concentration of Levothyroxine can be decreased when it is combined with Apalutamide.
Aprepitant
The serum concentration of Levothyroxine can be increased when it is combined with Aprepitant.
Atazanavir
The metabolism of Levothyroxine can be decreased when combined with Atazanavir.
Atomoxetine
The metabolism of Levothyroxine can be decreased when combined with Atomoxetine.
Boceprevir
The metabolism of Levothyroxine can be decreased when combined with Boceprevir.
Bortezomib
The metabolism of Levothyroxine can be decreased when combined with Bortezomib.
Bosentan
The serum concentration of Levothyroxine can be decreased when it is combined with Bosentan.
Brentuximab Vedotin
The serum concentration of Brentuximab vedotin can be decreased when it is combined with Levothyroxine.
Calcium Acetate
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Calcium Acetate.
Calcium Carbonate
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Calcium Carbonate.
CALCIUM CARBONATE, PRECIPITATED
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Calcium Carbonate.
Calcium Chloride
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Calcium Chloride.
Calcium Chloride Anhydrous
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Calcium Chloride.
Calcium Citrate
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Calcium Citrate.
Calcium Glubionate
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Calcium glubionate.
Calcium gluceptate
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Calcium Gluceptate.
Calcium Gluconate
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Calcium gluconate.
Calcium Lactate
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Calcium lactate.
Carbamazepine
The serum concentration of Levothyroxine can be decreased when it is combined with Carbamazepine.
Casein Allergenic Extract
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Casein.
Ceritinib
The serum concentration of Levothyroxine can be increased when it is combined with Ceritinib.
Chlorotrianisene
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Chlorotrianisene.
Cholestyramine Resin
The serum concentration of Levothyroxine can be decreased when it is combined with Cholestyramine.
Ciprofloxacin
The serum concentration of Levothyroxine can be decreased when it is combined with Ciprofloxacin.
Citalopram
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Citalopram.
Clarithromycin
The metabolism of Levothyroxine can be decreased when combined with Clarithromycin.
Clemastine
The metabolism of Levothyroxine can be decreased when combined with Clemastine.
Clomipramine
Levothyroxine may increase the arrhythmogenic activities of Clomipramine.
Clotrimazole
The metabolism of Levothyroxine can be decreased when combined with Clotrimazole.
Cobicistat
The metabolism of Levothyroxine can be decreased when combined with Cobicistat.
Colesevelam
The serum concentration of Levothyroxine can be decreased when it is combined with Colesevelam.
Colestipol
The serum concentration of Levothyroxine can be decreased when it is combined with Colestipol.
Conivaptan
The serum concentration of Conivaptan can be increased when it is combined with Levothyroxine.
Crizotinib
The metabolism of Levothyroxine can be decreased when combined with Crizotinib.
Cyclobenzaprine
Levothyroxine may increase the arrhythmogenic activities of Cyclobenzaprine.
Cyclosporine
The metabolism of Levothyroxine can be decreased when combined with Cyclosporine.
Dabigatran Etexilate
The serum concentration of Dabigatran etexilate can be decreased when it is combined with Levothyroxine.
Dabrafenib
The serum concentration of Levothyroxine can be decreased when it is combined with Dabrafenib.
Darunavir
The metabolism of Levothyroxine can be decreased when combined with Darunavir.
Dasatinib
The serum concentration of Levothyroxine can be increased when it is combined with Dasatinib.
Dasatinib Anhydrous
The serum concentration of Levothyroxine can be increased when it is combined with Dasatinib.
Deferasirox
The serum concentration of Levothyroxine can be decreased when it is combined with Deferasirox.
Delavirdine
The metabolism of Levothyroxine can be decreased when combined with Delavirdine.
Desipramine
Levothyroxine may increase the arrhythmogenic activities of Desipramine.
Desvenlafaxine
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Desvenlafaxine.
Dicumarol
Levothyroxine may increase the anticoagulant activities of Dicoumarol.
Dienestrol
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Dienestrol.
Diethylstilbestrol
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Diethylstilbestrol.
Dihydroergotamine
The metabolism of Levothyroxine can be decreased when combined with Dihydroergotamine.
Diltiazem
The metabolism of Levothyroxine can be decreased when combined with Diltiazem.
Dothiepin
Levothyroxine may increase the arrhythmogenic activities of Dosulepin.
Doxepin
Levothyroxine may increase the arrhythmogenic activities of Doxepin.
Doxorubicin
The serum concentration of Doxorubicin can be decreased when it is combined with Levothyroxine.
Doxorubicin Hydrochloride
The serum concentration of Doxorubicin can be decreased when it is combined with Levothyroxine.
Doxycycline
The metabolism of Levothyroxine can be decreased when combined with Doxycycline.
Doxycycline Anhydrous
The metabolism of Levothyroxine can be decreased when combined with Doxycycline.
Dronedarone
The metabolism of Levothyroxine can be decreased when combined with Dronedarone.
Duloxetine
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Duloxetine.
Dyphylline
The metabolism of Dyphylline can be increased when combined with Levothyroxine.
Enzalutamide
The serum concentration of Levothyroxine can be decreased when it is combined with Enzalutamide.
Equol, (-)-
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Equol.
Erythromycin
The metabolism of Levothyroxine can be decreased when combined with Erythromycin.
Escitalopram
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Escitalopram.
Estradiol
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Estradiol.
Estradiol acetate
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Estradiol acetate.
Estradiol Cypionate
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Estradiol cypionate.
Estradiol Valerate
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Estradiol valerate.
Estriol
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Estriol.
Estrogens, Conjugated (USP)
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Conjugated estrogens.
Estrogens, Esterified (USP)
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Estrogens, esterified.
Estrone
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Estrone.
Ethinyl Estradiol
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Ethinyl Estradiol.
Ferric Carboxymaltose
The serum concentration of Levothyroxine can be decreased when it is combined with Ferric Carboxymaltose.
Ferric Pyrophosphate
The serum concentration of Levothyroxine can be decreased when it is combined with Ferric pyrophosphate.
Fluconazole
The metabolism of Levothyroxine can be decreased when combined with Fluconazole.
Fluindione
Levothyroxine may increase the anticoagulant activities of Fluindione.
Fluoxetine
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Fluoxetine.
Fluvoxamine
The metabolism of Levothyroxine can be decreased when combined with Fluvoxamine.
Fosamprenavir
The metabolism of Levothyroxine can be decreased when combined with Fosamprenavir.
Fosaprepitant
The serum concentration of Levothyroxine can be increased when it is combined with Fosaprepitant.
Fosphenytoin
The serum concentration of Levothyroxine can be decreased when it is combined with Fosphenytoin.
Fusidate
The serum concentration of Levothyroxine can be increased when it is combined with Fusidic Acid.
Fusidic Acid
The serum concentration of Levothyroxine can be increased when it is combined with Fusidic Acid.
Genistein
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Genistein.
Hypoxis hemerocallidea root extract
The serum concentration of Levothyroxine can be decreased when it is combined with St. John's Wort.
Idelalisib
The metabolism of Levothyroxine can be decreased when combined with Idelalisib.
Imatinib
The metabolism of Levothyroxine can be decreased when combined with Imatinib.
Imipramine
Levothyroxine may increase the arrhythmogenic activities of Imipramine.
Indinavir
The metabolism of Levothyroxine can be decreased when combined with Indinavir.
INDINAVIR ANHYDROUS
The metabolism of Levothyroxine can be decreased when combined with Indinavir.
iodide ion I-131
The therapeutic efficacy of Iodide I-131 can be decreased when used in combination with Levothyroxine.
iodine I-131
The therapeutic efficacy of Iodide I-131 can be decreased when used in combination with Levothyroxine.
Iron
The serum concentration of Levothyroxine can be decreased when it is combined with Iron.
Iron Carbonyl
The serum concentration of Levothyroxine can be decreased when it is combined with Iron.
Iron Sucrose
The serum concentration of Levothyroxine can be decreased when it is combined with Iron saccharate.
Iron-Dextran Complex
The serum concentration of Levothyroxine can be decreased when it is combined with Iron Dextran.
Isavuconazole
The serum concentration of Levothyroxine can be increased when it is combined with Isavuconazole.
Isavuconazonium
The metabolism of Levothyroxine can be decreased when combined with Isavuconazonium.
Isradipine
The metabolism of Levothyroxine can be decreased when combined with Isradipine.
Itraconazole
The metabolism of Levothyroxine can be decreased when combined with Itraconazole.
Ivacaftor
The serum concentration of Levothyroxine can be increased when it is combined with Ivacaftor.
Ketoconazole
The metabolism of Levothyroxine can be decreased when combined with Ketoconazole.
Lanthanum Carbonate
The serum concentration of Levothyroxine can be decreased when it is combined with Lanthanum carbonate.
Ledipasvir
The serum concentration of Ledipasvir can be decreased when it is combined with Levothyroxine.
Levomilnacipran
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Levomilnacipran.
Linagliptin
The serum concentration of Linagliptin can be decreased when it is combined with Levothyroxine.
Lopinavir
The metabolism of Levothyroxine can be decreased when combined with Lopinavir.
Lovastatin
The metabolism of Levothyroxine can be decreased when combined with Lovastatin.
Luliconazole
The serum concentration of Levothyroxine can be increased when it is combined with Luliconazole.
Lumacaftor
The metabolism of Levothyroxine can be increased when combined with Lumacaftor.
Magnesium Hydroxide
The serum concentration of Levothyroxine can be decreased when it is combined with Magnesium hydroxide.
Magnesium Oxide
The serum concentration of Levothyroxine can be decreased when it is combined with Magnesium oxide.
Magnesium Salicylate
The serum concentration of Levothyroxine can be decreased when it is combined with Magnesium salicylate.
Magnesium Sulfate
The serum concentration of Levothyroxine can be decreased when it is combined with Magnesium sulfate.
MAGNESIUM SULFATE ANHYDROUS
The serum concentration of Levothyroxine can be decreased when it is combined with Magnesium sulfate.
Mestranol
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Mestranol.
Mifepristone
The serum concentration of Levothyroxine can be increased when it is combined with Mifepristone.
Milnacipran
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Milnacipran.
Mirtazapine
Levothyroxine may increase the arrhythmogenic activities of Mirtazapine.
Mitotane
The serum concentration of Levothyroxine can be decreased when it is combined with Mitotane.
Nefazodone
The metabolism of Levothyroxine can be decreased when combined with Nefazodone.
Nelfinavir
The metabolism of Levothyroxine can be decreased when combined with Nelfinavir.
Netupitant
The serum concentration of Levothyroxine can be increased when it is combined with Netupitant.
Nevirapine
The metabolism of Levothyroxine can be increased when combined with Nevirapine.
Nilotinib
The metabolism of Levothyroxine can be decreased when combined with Nilotinib.
Nortriptyline
Levothyroxine may increase the arrhythmogenic activities of Nortriptyline.
Olaparib
The metabolism of Levothyroxine can be decreased when combined with Olaparib.
Opipramol
Levothyroxine may increase the arrhythmogenic activities of Opipramol.
Orlistat
The serum concentration of Levothyroxine can be decreased when it is combined with Orlistat.
Osimertinib
The serum concentration of Levothyroxine can be increased when it is combined with Osimertinib.
Palbociclib
The serum concentration of Levothyroxine can be increased when it is combined with Palbociclib.
Paroxetine
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Paroxetine.
Pentobarbital
The metabolism of Levothyroxine can be increased when combined with Pentobarbital.
Phenindione
Levothyroxine may increase the anticoagulant activities of Phenindione.
Phenobarbital
The metabolism of Levothyroxine can be increased when combined with Phenobarbital.
Phenprocoumon
Levothyroxine may increase the anticoagulant activities of Phenprocoumon.
Phenytoin
The serum concentration of Levothyroxine can be decreased when it is combined with Phenytoin.
Piracetam
The risk or severity of adverse effects can be increased when Levothyroxine is combined with Piracetam.
Polyestradiol Phosphate
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Polyestradiol phosphate.
Polystyrene Sulfonate
The serum concentration of Levothyroxine can be decreased when it is combined with Tolevamer.
Polystyrene Sulfonic Acid
The serum concentration of Levothyroxine can be decreased when it is combined with Tolevamer.
Posaconazole
The metabolism of Levothyroxine can be decreased when combined with Posaconazole.
Primidone
The metabolism of Levothyroxine can be increased when combined with Primidone.
Promestriene
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Promestriene.
Protriptyline
Levothyroxine may increase the arrhythmogenic activities of Protriptyline.
Quinestrol
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Quinestrol.
Raloxifene
Raloxifene can cause a decrease in the absorption of Levothyroxine resulting in a reduced serum concentration and potentially a decrease in efficacy.
Ranolazine
The metabolism of Levothyroxine can be decreased when combined with Ranolazine.
Rifabutin
The metabolism of Levothyroxine can be increased when combined with Rifabutin.
Rifampin
The serum concentration of Levothyroxine can be decreased when it is combined with Rifampicin.
Rifapentine
The metabolism of Levothyroxine can be increased when combined with Rifapentine.
Rucaparib
The metabolism of Levothyroxine can be decreased when combined with Rucaparib.
Saquinavir
The metabolism of Levothyroxine can be decreased when combined with Saquinavir.
Saquinavir Mesylate
The metabolism of Levothyroxine can be decreased when combined with Saquinavir.
Sarilumab
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Sarilumab.
Sertraline
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Sertraline.
Sevelamer
The serum concentration of Levothyroxine can be decreased when it is combined with Sevelamer.
Sildenafil
The metabolism of Levothyroxine can be decreased when combined with Sildenafil.
Siltuximab
The serum concentration of Levothyroxine can be decreased when it is combined with Siltuximab.
Simeprevir
The serum concentration of Levothyroxine can be increased when it is combined with Simeprevir.
Sofosbuvir
The serum concentration of Sofosbuvir can be decreased when it is combined with Levothyroxine.
ST. JOHN'S WORT EXTRACT
The serum concentration of Levothyroxine can be decreased when it is combined with St. John's Wort.
Sucralfate
The serum concentration of Levothyroxine can be decreased when it is combined with Sucralfate.
Sucroferric Oxyhydroxide
The serum concentration of Levothyroxine can be decreased when it is combined with Iron saccharate.
Sulfisoxazole
The metabolism of Levothyroxine can be decreased when combined with Sulfisoxazole.
synthetic conjugated estrogens, A
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Synthetic Conjugated Estrogens, A.
synthetic conjugated estrogens, B
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Synthetic Conjugated Estrogens, B.
Telaprevir
The metabolism of Levothyroxine can be decreased when combined with Telaprevir.
Telithromycin
The metabolism of Levothyroxine can be decreased when combined with Telithromycin.
Theophylline
The metabolism of Theophylline can be increased when combined with Levothyroxine.
Theophylline anhydrous
The metabolism of Theophylline can be increased when combined with Levothyroxine.
Tianeptine
Levothyroxine may increase the arrhythmogenic activities of Tianeptine.
Tibolone
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Tibolone.
Ticlopidine
The metabolism of Levothyroxine can be decreased when combined with Ticlopidine.
Tocilizumab
The serum concentration of Levothyroxine can be decreased when it is combined with Tocilizumab.
Tricalcium Phosphate
The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Calcium Phosphate.
Trimipramine
Levothyroxine may increase the arrhythmogenic activities of Trimipramine.
Vemurafenib
The serum concentration of Levothyroxine can be decreased when it is combined with Vemurafenib.
Venlafaxine
The metabolism of Levothyroxine can be decreased when combined with Venlafaxine.
Verapamil
The metabolism of Levothyroxine can be decreased when combined with Verapamil.
Vincristine
The serum concentration of Vincristine can be decreased when it is combined with Levothyroxine.
Voriconazole
The metabolism of Levothyroxine can be decreased when combined with Voriconazole.
Warfarin
Levothyroxine may increase the anticoagulant activities of Warfarin.
Ziprasidone
The metabolism of Levothyroxine can be decreased when combined with Ziprasidone.
