Levothyroxine Interactions
Showing entire list of all interactions, including brand names and combination drugs.
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Medications known to interact with levothyroxine
F
- FaLessa Kit (ethinyl estradiol / folic acid / levonorgestrel)
- Falmina (ethinyl estradiol / levonorgestrel)
- Farbital (aspirin / butalbital / caffeine)
- Farxiga (dapagliflozin)
- Fast Acting Mylanta (calcium carbonate / magnesium hydroxide)
- Fastin (phentermine)
- Father John's Medicine Plus (chlorpheniramine / dextromethorphan / phenylephrine)
- Fayosim (ethinyl estradiol / levonorgestrel)
- Fe 50 (ferrous sulfate)
- Fe C (ascorbic acid/carbonyl iron)
- FE C Tab Plus (multivitamin with iron)
- Fe Caps (ferrous sulfate)
- FE-40 (ferrous gluconate)
- Fe-Stool (docusate / ferrous fumarate)
- Fe-Tinic 150 (ascorbic acid/iron polysaccharide)
- Fe-Tinic 150 Forte (multivitamin with iron)
- Fedahist (chlorpheniramine / pseudoephedrine)
- Fedahist Gyrocaps (chlorpheniramine / pseudoephedrine)
- Fedahist Timecaps (chlorpheniramine / pseudoephedrine)
- Feirza 1.5 / 30 (ethinyl estradiol / norethindrone)
- Feirza 1 / 20 (ethinyl estradiol / norethindrone)
- Fem-Natal (multivitamin, prenatal)
- Fematrix (estradiol)
- Femcet (acetaminophen / butalbital / caffeine)
- Femcon Fe (ethinyl estradiol / norethindrone)
- Femecal OB (multivitamin, prenatal)
- Femecal OB plus DHA (multivitamin, prenatal)
- femhrt (ethinyl estradiol / norethindrone)
- Femiron (ferrous fumarate)
- Femiron Multi with Iron (multivitamin with iron)
- Femlyv (ethinyl estradiol / norethindrone)
- Femnatal (multivitamin, prenatal)
- Fempatch (estradiol)
- Femquil (multivitamin with minerals)
- Femring (estradiol)
- Femsept (estradiol)
- FemSeven (estradiol)
- FemSeven Sequi Phase I (estradiol)
- FemTab (estradiol)
- Femtabs (multivitamin with minerals)
- Femtrace (estradiol)
- Femtran (estradiol)
- Femynor (ethinyl estradiol / norgestimate)
- Fendique ER (phendimetrazine)
- Fenesin PE IR (guaifenesin / phenylephrine)
- Fenex-PSE (guaifenesin / pseudoephedrine)
- fenfluramine
- Fentex (guaifenesin / phenylephrine / phenylpropanolamine)
- Feocyte (multivitamin with iron)
- Feogen (multivitamin with iron)
- Feonyx (multivitamin with iron)
- Feosol Complete (heme iron polypeptide / iron polysaccharide)
- Feosol Natural Release (carbonyl iron)
- Feosol Original (ferrous sulfate)
- Feostat (ferrous fumarate)
- Fer-Gen-Sol (ferrous sulfate)
- Fer-In-Sol (ferrous sulfate)
- Fer-Iron (ferrous sulfate)
- Feratab (ferrous sulfate)
- Ferate (ferrous gluconate)
- Ferbee (multivitamin with iron)
- Fergon (ferrous gluconate)
- FeRiva (multivitamin with iron)
- FeRiva 21/7 (multivitamin with iron)
- FeRivaFA (multivitamin with iron)
- Fero-Folic 500 (multivitamin with iron)
- Fero-Grad-500 (ascorbic acid/ferrous sulfate)
- Fero-Gradumet Filmtab (ferrous sulfate)
- Ferocon (multivitamin with iron)
- Ferocyl (docusate / ferrous fumarate)
- FeroSul (ferrous sulfate)
- Ferotrin (multivitamin with iron)
- Ferotrinsic (multivitamin with iron)
- Ferra T.D. Caps (ferrous sulfate)
- Ferra-Cap (carbonyl iron)
- Ferra-TD (ferrous sulfate)
- Ferragen (multivitamin with iron)
- Ferralet (ferrous gluconate)
- Ferralet 90 (multivitamin with iron)
- Ferraplus (multivitamin with iron)
- Ferretts IPS (iron protein succinylate)
- Ferretts Iron (ferrous fumarate)
- Ferrex 150 Forte (multivitamin with iron)
- Ferrex 150 Forte Plus (multivitamin with iron)
- Ferrex 150 Plus (ascorbic acid/iron polysaccharide)
- Ferrex 28 (multivitamin with iron)
- Ferrex PC Forte (multivitamin, prenatal)
- Ferrex-150 (iron polysaccharide)
- ferric citrate
- ferric maltol
- Ferrimin 150 (ferrous fumarate)
- Ferro Basic (docusate / ferrous fumarate)
- Ferro-Bob (ferrous sulfate)
- Ferro-Caps (docusate / ferrous fumarate)
- Ferro-DSS (docusate / ferrous fumarate)
- Ferro-Sequels (ascorbic acid/ferrous fumarate)
- Ferro-Sequels (old formulation) (docusate / ferrous fumarate)
- Ferro-Time (ferrous sulfate)
- Ferrocite (ferrous fumarate)
- Ferrocite F (ferrous fumarate/folic acid)
- Ferrocite Plus (multivitamin with minerals)
- Ferroflex-150 Forte (multivitamin with iron)
- Ferrogels Forte (multivitamin with iron)
- Ferrospace (ferrous sulfate)
- Ferrous DS (docusate / ferrous fumarate)
- ferrous fumarate
- ferrous fumarate/folic acid
- ferrous fumarate/folic acid/iron polysaccharide
- ferrous fumarate/iron polysaccharide
- ferrous gluconate
- ferrous sulfate
- ferrous sulfate/folic acid
- Ferrousal (ferrous sulfate)
- FerroVite (multivitamin with iron)
- FerroVite FA (multivitamin with iron)
- FerroVite Forte (multivitamin with iron)
- Ferus Pic-150 (iron polysaccharide)
- Fetrin (multivitamin with iron)
- fexofenadine / pseudoephedrine
- Fiasp (insulin aspart)
- Fiber Choice Weight Management (chromium picolinate / inulin)
- Fiber Lax (polycarbophil)
- Fiber Laxative (polycarbophil)
- Fiberall Tablets (polycarbophil)
- FiberCon (polycarbophil)
- Fibernorm (polycarbophil)
- Fibertab (polycarbophil)
- Fintepla (fenfluramine)
- Finzala (ethinyl estradiol / norethindrone)
- Fioricet (acetaminophen / butalbital / caffeine)
- Fioricet with Codeine (acetaminophen / butalbital / caffeine / codeine)
- Fiorinal (aspirin / butalbital / caffeine)
- Fiorinal with Codeine (aspirin / butalbital / caffeine / codeine)
- Fiorinal with Codeine III (aspirin / butalbital / caffeine / codeine)
- Fiormor (aspirin / butalbital / caffeine)
- Fiorpap (acetaminophen / butalbital / caffeine)
- Fiortal (aspirin / butalbital / caffeine)
- Fiortal with Codeine (aspirin / butalbital / caffeine / codeine)
- FIRST Mouthwash BLM (aluminum hydroxide / diphenhydramine / lidocaine / magnesium hydroxide / simethicone topical)
- FIRST-Testosterone (testosterone)
- FIRST-Testosterone MC (testosterone)
- Fit Food Lean Complete (multivitamin with minerals)
- Flanax Antacid Liquid (aluminum hydroxide / magnesium hydroxide / simethicone)
- Flatulex (charcoal / simethicone)
- Flatulex Drops (simethicone)
- Flintstones Complete (multivitamin with iron)
- Flintstones Gummies (multivitamin with minerals)
- Flintstones with Calcium (multivitamin with minerals)
- Flintstones with Iron Chewable (multivitamin with iron)
- Flo-Pred (prednisolone)
- FloLipid (simvastatin)
- Florical (calcium carbonate / fluoride)
- Florinef (fludrocortisone)
- Florinef Acetate (fludrocortisone)
- Flu & Severe Cold & Cough Daytime Powder (acetaminophen / dextromethorphan / phenylephrine)
- fludrocortisone
- fluoxetine
- fluoxetine / olanzapine
- fluoxymesterone
- Flutabs (acetaminophen / dextromethorphan / guaifenesin / pseudoephedrine)
- FluTuss HC (brompheniramine / hydrocodone / phenylephrine)
- Focalgin 90 DHA (multivitamin, prenatal)
- Focalgin CA (multivitamin, prenatal)
- Focalgin DSS (multivitamin with iron)
- Focalgin-B (calcium / folic acid / ginger / pyridoxine)
- Folbecal (multivitamin, prenatal)
- Folbee Plus CZ (multivitamin with minerals)
- Folcal DHA (multivitamin, prenatal)
- Folcaps Care One (multivitamin, prenatal)
- Folcaps Omega 3 (multivitamin, prenatal)
- Folet DHA (multivitamin, prenatal)
- Folet One with DHA (multivitamin, prenatal)
- Folgard (multivitamin with minerals)
- Folgard OS (multivitamin with minerals)
- Foli-Iron (multivitamin with minerals)
- folic acid/heme iron polypeptide
- FoliNatal Plus B (multivitamin, prenatal)
- FoliTab 500 (multivitamin with iron)
- Folite (multivitamin with minerals)
- Folivan-EC DHA (multivitamin, prenatal)
- Folivan-F (multivitamin with iron)
- Folivan-OB (multivitamin, prenatal)
- Folivan-Plus (multivitamin with iron)
- Folivan-PRX DHA (multivitamin, prenatal)
- Folivane-PRx DHA NF (multivitamin, prenatal)
- Folpace Rx (multivitamin with minerals)
- Foltabs (multivitamin, prenatal)
- Foltabs 90 plus DHA (multivitamin, prenatal)
- Foltabs plus DHA (multivitamin, prenatal)
- Foltabs Prenatal (multivitamin, prenatal)
- Foltabs Prenatal Plus DHA (multivitamin, prenatal)
- Foltrin (multivitamin with iron)
- Formula B Plus (multivitamin with minerals)
- Formula Twenty-One (multivitamin with minerals)
- Fortabs (aspirin / butalbital / caffeine)
- Fortamet (metformin)
- Fortesta (testosterone)
- Fosfree (multivitamin with minerals)
- Fosrenol (lanthanum carbonate)
- Fruity Chews with Iron (multivitamin with iron)
- Fumasorb (ferrous fumarate)
- Fumatinic (multivitamin with iron)
- Furoscix (furosemide)
- furosemide
- Fusion Plus (multivitamin with iron)
- Fusion Sprinkles with Probiotic (multivitamin with iron)
- Fyavolv (ethinyl estradiol / norethindrone)
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Drug Interaction Classification
Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit. | |
Moderately clinically significant. Usually avoid combinations; use it only under special circumstances. | |
Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan. | |
No interaction information available. |
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Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.