Levothyroxine Interactions
Showing entire list of all interactions, including brand names and combination drugs.
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Medications known to interact with levothyroxine
O
- O-CAL FA (multivitamin with minerals)
- O-Cal Prenatal (multivitamin, prenatal)
- O-Cal-D (calcium / vitamin d)
- OB Complete (multivitamin, prenatal)
- OB Complete 400 (multivitamin, prenatal)
- OB Complete 400 with DHA (multivitamin, prenatal)
- OB Complete Chewables (multivitamin, prenatal)
- OB Complete Gold (multivitamin, prenatal)
- OB Complete One with DHA (multivitamin, prenatal)
- OB Complete Petite (multivitamin, prenatal)
- OB Complete Petite with DHA (multivitamin, prenatal)
- OB Complete Premier (multivitamin, prenatal)
- OB Complete with DHA (multivitamin, prenatal)
- OB Natal One (multivitamin, prenatal)
- Ob-20 (multivitamin, prenatal)
- Obegyn (multivitamin, prenatal)
- Obenix (phentermine)
- Obephen (phentermine)
- Obezine (phendimetrazine)
- Obnate 90 (multivitamin, prenatal)
- Obstetrix EC (multivitamin, prenatal)
- Obstetrix One (multivitamin, prenatal)
- Obtrex (multivitamin, prenatal)
- Obtrex DHA (multivitamin, prenatal)
- Oby-Cap (phentermine)
- Oby-Trim (phentermine)
- Occuplex (multivitamin with minerals)
- Ocella (drospirenone / ethinyl estradiol)
- Octocaine 100 (epinephrine / lidocaine)
- Ocular Vitamins with Lutein (multivitamin with minerals)
- Ocuvite (multivitamin with minerals)
- Ocuvite Adult 50+ (multivitamin with minerals)
- Ocuvite Extra (multivitamin with minerals)
- Ocuvite Eye + Multi (multivitamin with minerals)
- Ocuvite Lutein (multivitamin with minerals)
- Ocuvite PreserVision (multivitamin with minerals)
- Odactra (house dust mite allergen extract)
- Oesclim (estradiol)
- Oestradiol Implants (estradiol)
- Oestrodose (estradiol)
- Oestrogel (estradiol)
- Oestrogel Pump-Pack (estradiol)
- Ogen (estropipate)
- Ogen 0.625 (estropipate)
- Ogen 1.25 (estropipate)
- Ogen 2.5 (estropipate)
- Ogen Vaginal Cream (estropipate topical)
- Ogestrel 0.5 / 50 (ethinyl estradiol / norgestrel)
- Oleptro (trazodone)
- Olly Women's Multi Gummy (multivitamin with minerals)
- ombitasvir / paritaprevir / ritonavir
- Omeclamox-Pak (amoxicillin / clarithromycin / omeprazole)
- omeprazole
- omeprazole / sodium bicarbonate
- Omesec (omeprazole)
- Omnihist II LA (chlorpheniramine / methscopolamine / phenylephrine)
- Omnihist L.A. (chlorpheniramine / methscopolamine / phenylephrine)
- One A Day Adult Triple Immune Support (multivitamin with minerals)
- One A Day Men's Complete (multivitamin with minerals)
- One A Day Multi Plus Immunity Defense Gummies (multivitamin with minerals)
- One A Day Vitacraves Adult Gummies (multivitamin with minerals)
- One A Day Women's Complete (multivitamin with minerals)
- One A Day Women's Menopause Formula (multivitamin with minerals)
- One A Day Women's Prenatal (multivitamin, prenatal)
- One Daily Combo Pack (multivitamin, prenatal)
- One Daily Essential (multivitamin with minerals)
- One Daily with Minerals (multivitamin with minerals)
- One Tab Daily with Iron (multivitamin with iron)
- One Tab Daily with Minerals (multivitamin with minerals)
- One-A-Day Max (multivitamin with minerals)
- One-A-Day Men 50 Plus (multivitamin with minerals)
- One-A-Day Men Pro Edge (multivitamin with minerals)
- One-A-Day Mens 50+ Healthy Advantage (multivitamin with minerals)
- One-A-Day Vitacraves (multivitamin with minerals)
- One-A-Day Vitacraves Men's (multivitamin with minerals)
- One-A-Day Vitacraves Women's (multivitamin with minerals)
- One-A-Day WeightSmart (multivitamin with minerals)
- One-A-Day Within (multivitamin with minerals)
- One-A-Day Women (multivitamin with minerals)
- One-A-Day Women 50 Plus (multivitamin with minerals)
- Onglyza (saxagliptin)
- Onset Forte (acetaminophen / chlorpheniramine / phenylephrine)
- Onsura (ethinyl estradiol / norelgestromin)
- Opti-Gen (multivitamin with minerals)
- Opticleanse Plus (multivitamin with minerals)
- Optifast Post Bariatric (multivitamin with minerals)
- Optilets-M-500 (multivitamin with minerals)
- Optimetabolix (multivitamin with minerals)
- Optimetabolix 2:1 (multivitamin with minerals)
- Optimum Magnesium Gluconate (magnesium gluconate)
- OptiNate (multivitamin, prenatal)
- OptiPranolol (metipranolol ophthalmic)
- Optisource Post Bariatric Surgery (multivitamin with minerals)
- Optivite PMT (multivitamin with minerals)
- Or-Phen-Ade (chlorpheniramine / phenylpropanolamine)
- Orabloc (articaine / epinephrine)
- Oralair (mixed grass pollens allergen extract)
- Orapred (prednisolone)
- Orapred ODT (prednisolone)
- Orasone (prednisone)
- Oratuss 12 (carbetapentane / guaifenesin / phenylephrine)
- Orbivan (acetaminophen / butalbital / caffeine)
- Orbivan CF (acetaminophen / butalbital)
- Ordrine (chlorpheniramine / phenylpropanolamine)
- Ordrine AT (caramiphen / phenylpropanolamine)
- Oreton Methyl (methyltestosterone)
- Organon Oestradiol (estradiol)
- Oriahnn (elagolix / estradiol / norethindrone)
- Orinase (tolbutamide)
- Orlenta (chlorpheniramine / pseudoephedrine)
- orlistat
- Ornade Spansules (chlorpheniramine / phenylpropanolamine)
- Ornex (acetaminophen / pseudoephedrine)
- Ornex Maximum Strength (acetaminophen / pseudoephedrine)
- Oromone (estradiol)
- Orsythia (ethinyl estradiol / levonorgestrel)
- Ortho Cyclen (ethinyl estradiol / norgestimate)
- Ortho Dienestrol (dienestrol topical)
- Ortho Evra (ethinyl estradiol / norelgestromin)
- Ortho Tri-Cyclen (ethinyl estradiol / norgestimate)
- Ortho Tri-Cyclen Lo (ethinyl estradiol / norgestimate)
- Ortho-Cept (desogestrel / ethinyl estradiol)
- Ortho-Est (estropipate)
- Ortho-Novum 1 / 35 (ethinyl estradiol / norethindrone)
- Ortho-Novum 1 / 50 (mestranol / norethindrone)
- Ortho-Novum 10 / 11 (ethinyl estradiol / norethindrone)
- Ortho-Novum 7 / 7 / 7 (ethinyl estradiol / norethindrone)
- Ortho-Prefest (estradiol / norgestimate)
- Ortikos (budesonide)
- Os-Cal (calcium carbonate)
- Os-Cal 500 Chewable (calcium / vitamin d)
- Os-Cal Calcium+D3 (calcium / vitamin d)
- Os-Cal Extra D3 (calcium / vitamin d)
- Os-Cal Ultra (multivitamin with minerals)
- OSAplex (multivitamin with minerals)
- Oseni (alogliptin / pioglitazone)
- Oshih (ethinyl estradiol / norethindrone)
- Osteocit D Plus (calcium / vitamin d)
- Ostiva (multivitamin with minerals)
- Otis Clapp Back Quell (acetaminophen / magnesium salicylate)
- Ovcon 35 (ethinyl estradiol / norethindrone)
- Ovcon 35 Fe (ethinyl estradiol / norethindrone)
- Ovcon 50 (ethinyl estradiol / norethindrone)
- Ovol (simethicone)
- Ovral (ethinyl estradiol / norgestrel)
- Ovral-21 (ethinyl estradiol / norgestrel)
- Ovral-28 (ethinyl estradiol / norgestrel)
- Oxandrin (oxandrolone)
- oxandrolone
- oxtriphylline
- oxymetholone
- Oysco 500 (calcium carbonate)
- Oysco 500 with D (calcium / vitamin d)
- Oysco D (calcium / vitamin d)
- Oysco D with Calcium (calcium / vitamin d)
- Oyst Cal (calcium carbonate)
- Oyst Cal 500 (calcium carbonate)
- Oyst-Cal-D (calcium / vitamin d)
- Oyster (calcium carbonate)
- Oyster Cal (calcium carbonate)
- Oyster Cal 500 (calcium carbonate)
- Oyster Calcium (calcium carbonate)
- Oyster Shell (calcium carbonate)
- Oyster Shell Calcium (calcium carbonate)
- Oyster Shell Calcium 500 (calcium carbonate)
- Oyster Shell Calcium with Vitamin D (calcium / vitamin d)
- Oyster-D (calcium / vitamin d)
- Oystercal-D (calcium / vitamin d)
- Ozempic (semaglutide)
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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.