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Doctor insights on: Allergic Reaction To Levothyroxine

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Dr. John Chiu
2,638 Doctors shared insights

Allergies (Definition)

Allergies occur when your immune system is triggered by envirionmental factors it should ignore--for example, pollen in the air, or dander on a cat or dog--and creates cells to fight against them. An allergic reaction typically causes itching, congestion, or drainage, and ...Read more


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I'm allergic to iodine. I am hashi hypothyroid. Can only take brand Synthroid (thyroxine) & cytomel. But when taken together I have a severe allergic reaction.

I'm allergic to iodine. I am hashi hypothyroid. Can only take brand Synthroid (thyroxine) & cytomel. But when taken together I have a severe allergic reaction.

Check w/Pharmacist: If you mean taking the two pills at the same time causes a reaction, but taking either one by itself does not, then you could try taking them several hours apart (like one w/bkfst and other w/dinner). If that fails, will need to talk to endocrinologist to see if can manage on one agent. ...Read more

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Can you get levothyroxine allergies?

Can you get levothyroxine allergies?

Possible: It is rare to develop allergy to levothyroxine, which is a medication used to treat hypothyroidism. However, there are reports of allergy to such medications. ...Read more

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I have controlled hypothyroidism by taking levothyroxine. However I have chronic allergies producing urticaria and rhinorhea. Which antihistamine best?

Benadryl (diphenhydramine) would be an: Effective antihistamine. Ask your allergist if adding an antileukotriene and a steroid would also help. Take care! ...Read more

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Is it possible to be allergic to levothyroxine? I have had reactions to Synthroid & all of its generics. Tried tirosint but am allergic to the gelatin

Is it possible to be allergic to levothyroxine? I have had reactions to Synthroid & all of its generics. Tried tirosint but am allergic to the gelatin

Possible: It is possible to be allergic to anything, just as you are allergic to peanuts and wheat; however, the extent of allergic reaction is what matters. If it is tolerable and something like just mild, u can take it and just bear with it. If it gives you shortness of breath or hives, etc then do not take it at all. Talk to your primary care physician about options. ...Read more

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If your allergic to the ingredient levothyroxine sodium what are other options?

If your allergic to the ingredient levothyroxine sodium what are other options?

Levothyroxine: Not sure what you define as allergy to levothyroxine, this is a very unlikely allergy to occur as levothyroxine isa hormone naturally present within us. There are other options that your doctor can discuss with you, but I would verify the allergy part first. ...Read more

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Would increasing my levrothroxine 125 to higher give me more energy or could it be a combination of my allergies and harmonies that makes me tired?

Would increasing my levrothroxine 125 to higher give me more energy or could it be a combination of my allergies and harmonies that makes me tired?

Wouldn't advise: Inscreasing it on your own, allergies and hormonal imbalance can cause the symptoms you have, please see your doctor, wish you wellness ...Read more

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If I stop taking levothyroxine, how many days will it take for me to see the result?

If I stop taking levothyroxine, how many days will it take for me to see the result?

Variable: Why are you on the med?
It will depend on metabolism and need, whether it would be a clinical
finding or a lab finding. ...Read more

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I have been on 125 mcg of levothyroxine for many years. Recently has TSH done and result was 1.18. Dose now 112. Now test 5.0. Is this normal?

I have been on 125 mcg of levothyroxine for many years. Recently has TSH done and result was 1.18. Dose now 112. Now test 5.0. Is this normal?

Need more thyroid: More important than the TSH is how you are feeling. Thyroid blood tests are often a waste of blood. If your heart rate is normal, and you're feeling well, you are on the right dose. Most hypothyroid patients feel better with a low TSH. Also, levothyroxine (T4) is inactive, and must be deiodinated to active T3 (liothyronine). Armour thyroid (a combination of T3 (liothyronine) and T4) is usually more effective than T4 alone ...Read more

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T4-free test result are 0.84 my value, standard Range 0.76-1.46 Do I have hypothyroidism? Do I need Levothyroxine 50*?

T4-free test result are 0.84 my value, standard Range 0.76-1.46 Do I have hypothyroidism? Do I need Levothyroxine 50*?

TSH???: Hi. The normal range...CAN BE PERFECTLY NORMAL. Without seeing a TSH, I can't tell you. And even seeing a TSH, there is a tiny subset of hypothyroid patients who are hypothyroid not on the basis of thyroid disease, but of pituitary disease; their labs require a much differ mindset for interpretation. NO ONE would diagnose hypothyroidism without seeing a TSH! ...Read more

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If I'm severely allergic to iodine can I take levothyroxine and synthetic T3 (liothyronine) meds?

Yes: These meds are not iodine but thyroid products, if you will, that assist and make it possible for you to have normal metabolic function with an under active thyroid (not making enough on its own). ...Read more

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My TSH is on the high side of normal and I take levothyroxine. Am I at lower risk for developing thyroid nodules as a result?

My TSH is on the high side of normal and I take levothyroxine. Am I at lower risk for developing thyroid nodules as a result?

No: Nodules cannot be prevented by levothyroxine, nor can that drug shrink or otherwise change nodules. Nodules occur for other reasons, outside the control of that drug. ...Read more

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Thyroid test result was 9.08 microU/ml doctor proscribed me 50 Mikrogramm levothyroxine I now feel worse from one month aots of breathing problem.

Thyroid test result was 9.08 microU/ml doctor proscribed me 50 Mikrogramm levothyroxine I now feel worse from one month aots of breathing problem.

Probably unrelated: Hi. At face value, everything your doc did looks completely appropriate. Breathing problems are not a manifestation of either under-replacement or over-replacement of thyroid hormone, so whatever the breathing thing is, it's probably unrelated to your thyroid situation. Maybe asthma, bronchitis, etc. Ask your doc about your breathing problem. If it's serious, go to the ER. Good luck! ...Read more

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What do levothyroxine tablets contain?

What do levothyroxine tablets contain?

Trick question: Hi. Like when was the War of 1812, or who's buried in Grant's tomb, what's in l-thyroxine tablets? L-thyroxine!!! ...Read more

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What do levothyroxine tablets contain?

What do levothyroxine tablets contain?

Levothyroxine: Levothyroxine tablets simply contains thyroid hormone and is prescribed when your thyroid levels are low.
At your age it would be appropriate to try and find out why your thyroid gland is not working properly. It is not uncommon to have a thyroid problem at your age so you need to fully understand what is wrong and how Levothyroxine will help you. ...Read more

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Symptoms of over medicated levothyroxine?

Symptoms of over medicated levothyroxine?

Levothyroxine Excess: You didn't mention the dose you were taking and the number of tablets you had over medicated with so it's difficult to project if you have a dangerous situation going on. The usual signs and symptoms of thyroid toxicity are a racing heart where it feels like it's throbbing, nervousness, intolerance to heat, increase in blood pressure, insomnia, and irritability. ...Read more

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Can I take epherine when taking levothyroxine?

Can I take epherine when taking levothyroxine?

Do you mean: Ephedrine (ephedrine (ephedrine sulfate) sulfate)? If so, there are very few modern indications for ephedrine (ephedrine sulfate). Why are you taking it, and has it been recommended by your doctor? It can interact with T4 (levothyroxine) depending upon the dose and levels of both drugs. There are better and safer asthma meds if that's why you're on itl. ...Read more

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Can you tell me if I could get prescribed levothyroxine?

Can you tell me if I could get prescribed levothyroxine?

For Hypothyroidism: levothyroxine is usually prescribed for the condition of hypothyroidism. Labs are used to determine if you are suffering from thyroid disease. See your doctor if you are having weakness, cold intolerance, depression, hair/skin changes or suspect you are suffering from a thyroid condition for further workup. ...Read more

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Can levothyroxine cause anxiety?

Can levothyroxine cause anxiety?

Possibly: Levothyroxine can possibly cause anxiety if it is taken for the wrong reason or if the dose is too high. See your doctor and get your labwork checked on a regular basis to make sure your dose is correct. ...Read more

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Levothyroxine overdose side effects?

Levothyroxine overdose side effects?

Hyperthroidism: Taking too much levothyroxine causes hyperthyroidism. This can cause your metabolism to be too fast, causing you to lose weight, have a fast heart rate, lose your hair, and feel like it is too hot all of the time. It is definitely not recommended you take too much of your medication. ...Read more

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Can you drink coffe after levothyroxine?

Nothing by mouth 1hr: Avoid any food or medication for one hour after taking levothyroxine first thing in the morning. ...Read more

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Do milk thistlle & Levothyroxine not mix?

Do milk thistlle & Levothyroxine not mix?

No: Can take both, thyroid medication interacts with many things. Including food. What I tell my patients is whatever you do do it consistently, then we can adjust your medication. So don't take milk thistle once in a while, either take it daily and check your thyroid levels regularly, or do not take it. ...Read more

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Can I take hydroxycut if I take levothyroxine?

Not if it contains: Green coffee bean extract or caffeine. Otherwise, ok to take. By the way, it will not help you lose weight. ...Read more

Dr. John Chiu
1,044 Doctors shared insights

Allergic Reaction (Definition)

Sensitivities to substances, called allergens, that come into contact with the skin, nose, eyes, respiratory tract, and gastrointestinal tract. They can be inhaled into the ...Read more


Dr. David Sneid
1,422 Doctors shared insights

Thyroxine (Definition)

Thyroxine is a thyroid agent. ...Read more