Levothyroxine Interactions
Showing entire list of all interactions, including brand names and combination drugs.
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Medications known to interact with levothyroxine
I
- I-Fol Plus (multivitamin with minerals)
- I-L-X (multivitamin with iron)
- I-L-X and B12 (multivitamin with iron)
- I-Sense (multivitamin with minerals)
- I-Sense OccuShield (multivitamin with minerals)
- I-Vite (multivitamin with minerals)
- I-Vite Protect (multivitamin with minerals)
- i3odine Max (sodium iodide-i-131)
- IBC 500 (multivitamin with iron)
- Iberet (multivitamin with iron)
- Iberet Liquid (multivitamin with iron)
- Iberet-500 (multivitamin with iron)
- Iberet-Folic-500 (multivitamin with iron)
- ibuprofen / phenylephrine
- ibuprofen / pseudoephedrine
- Icaps (multivitamin with iron)
- ICaps AREDS (multivitamin with minerals)
- ICaps AREDS 2 (multivitamin with minerals)
- ICaps Lutein & Omega-3 (multivitamin with minerals)
- ICaps MV (multivitamin with minerals)
- ICaps Plus (multivitamin with minerals)
- Icaps TR (multivitamin with minerals)
- ICaps with Lutein and Zeaxan (multivitamin with minerals)
- ICaps with Lutein and Zeaxanthin (multivitamin with minerals)
- Icar (carbonyl iron)
- Icar Prenatal (multivitamin, prenatal)
- Icar Prenatal Chewable Calcium (calcium carbonate)
- Icar-C (ascorbic acid/carbonyl iron)
- Icar-C Plus (multivitamin with iron)
- Icar-C Plus SR (multivitamin with iron)
- Icare Prenatal Rx (multivitamin, prenatal)
- Iclevia (ethinyl estradiol / levonorgestrel)
- IDA (acetaminophen / dichloralphenazone / isometheptene mucate)
- Ide-cet (acetaminophen / butalbital / caffeine)
- Idenal (aspirin / butalbital / caffeine)
- Iferex 150 (iron polysaccharide)
- Iferex 150 Forte (multivitamin with iron)
- Iletin II Lente Pork (insulin zinc)
- Iletin II NPH Pork (insulin isophane)
- Iletin II Regular Pork (insulin regular)
- Iletin Lente (insulin zinc)
- Iletin NPH (insulin isophane)
- Iletin Regular (insulin regular)
- imatinib
- imipramine
- Imkeldi (imatinib)
- Immune Jelly Beans (multivitamin with minerals)
- Imodium Multi-Symptom Relief (loperamide / simethicone)
- Imvexxy (estradiol topical)
- Inatal Advance (multivitamin, prenatal)
- Inatal Ultra (multivitamin, prenatal)
- Inderal (propranolol)
- Inderal LA (propranolol)
- Inderal XL (propranolol)
- Inderide (hydrochlorothiazide / propranolol)
- Inderide LA (hydrochlorothiazide / propranolol)
- indinavir
- Infanate DHA (multivitamin, prenatal)
- Infantaire Gas Relief (simethicone)
- InnoPran XL (propranolol)
- Inpefa (sotagliflozin)
- insulin
- insulin aspart
- insulin aspart protamine
- insulin aspart/insulin aspart protamine
- insulin aspart/insulin degludec
- insulin degludec
- insulin degludec / liraglutide
- insulin detemir
- insulin glargine
- insulin glargine / lixisenatide
- insulin glulisine
- insulin inhalation, rapid acting
- insulin isophane
- insulin isophane / insulin regular
- insulin lispro
- insulin lispro protamine
- insulin lispro/insulin lispro protamine
- Insulin Purified NPH Pork (insulin isophane)
- insulin regular
- insulin zinc
- insulin zinc extended
- Integra (multivitamin with iron)
- Integra F (multivitamin with iron)
- Integra Plus (multivitamin with iron)
- Intrinsitinic (multivitamin with iron)
- Intropin (dopamine)
- Introvale (ethinyl estradiol / levonorgestrel)
- Invokamet (canagliflozin / metformin)
- Invokamet XR (canagliflozin / metformin)
- Invokana (canagliflozin)
- Iodal HD (chlorpheniramine / hydrocodone / phenylephrine)
- Iodotope (sodium iodide-i-131)
- Iofed (brompheniramine / pseudoephedrine)
- Iofed PD (brompheniramine / pseudoephedrine)
- Iohist D (pheniramine / phenylpropanolamine / phenyltoloxamine / pyrilamine)
- Iohist DM (brompheniramine / dextromethorphan / phenylpropanolamine)
- Ionamin (phentermine)
- Iosal II (guaifenesin / pseudoephedrine)
- Iosopan (magaldrate)
- Iotex PSE (guaifenesin / pseudoephedrine)
- Iotussin D Liquid (hydrocodone / pseudoephedrine)
- Iotussin HC (chlorpheniramine / hydrocodone / phenylephrine)
- Ipsatol Cough Formula (dextromethorphan / guaifenesin / phenylpropanolamine)
- Ircon (ferrous fumarate)
- Ircon-FA (ferrous fumarate/folic acid)
- Iro-Plex (multivitamin with iron)
- Irofol (multivitamin with iron)
- Iromin G (multivitamin with iron)
- Iron 100 Plus (multivitamin with iron)
- iron bisglycinate
- Iron Chews (carbonyl iron)
- Iron Chews Pediatric (carbonyl iron)
- Iron Folate Plus (multivitamin with iron)
- Iron Folate-F (multivitamin with iron)
- Iron Fumarate (ferrous fumarate)
- Iron Gluconate (ferrous gluconate)
- iron polysaccharide
- iron protein succinylate
- Iron Sulfate (ferrous sulfate)
- Iron-150 (multivitamin with iron)
- Irospan 24/6 (multivitamin with iron)
- Isibloom (desogestrel / ethinyl estradiol)
- Iso-Acetazone (acetaminophen / dichloralphenazone / isometheptene mucate)
- Isocaine with Levonordefrin (levonordefrin / mepivacaine)
- Isocet (acetaminophen / butalbital / caffeine)
- Isocom (acetaminophen / dichloralphenazone / isometheptene mucate)
- IsonaRif (isoniazid / rifampin)
- isoniazid / pyrazinamide / rifampin
- isoniazid / rifampin
- Isophen-DF (chlorpheniramine / pseudoephedrine)
- isoproterenol / phenylephrine
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Related treatment guides
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.