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Doctor insights on: Thyroxine

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Dr. David Sneid
1,375 doctors shared insights

Thyroxine (Overview)

Thyroxine is a thyroid agent.nutritional or metabolic agent.


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What does thyroxine total blood test tells a doctor about the patient?

What does thyroxine total blood test tells a doctor about the patient?

Not much: Thyroid hormones like thyroxine float around partly bound to proteins and partly "free". Only the free portion is active. In someone with a normal thyroid, the more protein that is present, the more thyroxine gets stuck, the more thyroxine produced so that the free portion stays normal. So the total goes up, but the free thyroxine is normal. Pregnancy and birth control can make the protein go up. ...Read more

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Dr. David Sneid
1,375 doctors shared insights

Thyroxine (Overview)

Thyroxine is a thyroid agent.nutritional or metabolic agent.


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What exactly is an overdose of thyroxine for a hypothyroidism patient?

What exactly is an overdose of thyroxine for a hypothyroidism patient?

Symptomatic: Many times will treat based on symptoms once dz is confirmed (within a certain range of normal). If symptoms of hyperthyroid would cut down dose, ie anxiety, agitation, tremor, exophthalmos, palpitations, diarrhea, jittery, racing heart, overheating, significant wt loss, insatiable appetite etc.... ...Read more

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Can you please define normal level of T3 (liothyronine) triodothyronine, T4 thyroxine, and tsh.?

Can you please define normal level of T3 (liothyronine) triodothyronine, T4 thyroxine, and tsh.?

100-200ngm/dl,4.5-11: Tsh between 0.4 and 4.0 t4 4.5 to 11.2 micrigm per deciliter(mcg/dl) t3 is100to200nanogram per deciliter(ngm/dl). ...Read more

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Thyroxine stopped suddenly when I ran out.Might it be a problem?

Thyroxine stopped suddenly when I ran out.Might it be a problem?

Yes it may be: It depends on why you were taking it. If you have complete hypothyroidism from thyroid surgery or radioactive iodine treatment, then you need to re-start. However, since the hormone lasts for a few days in your system, it may take a week or more before you have symptoms of hypothyroidism. ...Read more

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My wife been diagonsed with hypothyroidism.She has been prescribed for sodium thyroxine. We are looking for that medicine from vegetarian source ?

My wife been diagonsed with hypothyroidism.She has been prescribed for sodium thyroxine. We are looking for that medicine from vegetarian source ?

It is vegetarian: All sodium levothyroxine is derived from vegetarian sources so no need to look any further. The only animal-derived thryoid medicines are thyroid glandular extracts like Armour Thyroid and nature-throid. Most who are hypothyroid also benefit from liothyronine, which is also vegetarian- see http://thyroid.About.Com/od/t3treatment/tp/t4-t3-thyroid-treatment.Htm & http://bit.Ly/15k26u8 for more info. ...Read more

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Weights loss as a side effects of thyroxine use - how much is too much?

Weights loss as a side effects of thyroxine use - how much is too much?

When TSH is low: People who take thyroxine for simple hypothyroidism should have normal TSH to be safe. They should not loose weight, unless their prior weight gain was due to hypothyroidism. Taking too much thyroxine can cause atrial fibrillation and osteoporosis. On the other hand people with thyroid cancer are sometimes given a slight excess of thyroxine to prevent the cancer from returning. ...Read more

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Thyroxine sodium vs levothyroxine. Which one is more effective?

Thyroxine sodium vs levothyroxine. Which one is more effective?

Stick with one: Thyroxine sodium and levothyroxine are simply different forms of generic "synthroid". Neither is better than the other. Whichever form you take, stick with it. The bioavailability of each thyroid preparation is a little different. If you switch from one form to another, your thyroid numbers may change, and you may start to feel hypo or hyper. Sometimes pharmacists switch you to save $. ...Read more

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In what time frame does thyroxine work?

Weeks: Since the thyroxine has a long duration in the body, every daily pill contributes little to the total body thyroid hormone content. As a consequence, it takes a long time (6 weeks) for thyroxine levels to reach the target level once treatment is started. ...Read more

Dr. Joseph Mathews
592 doctors shared insights

Synthroid (Definition)

Synthroid is a thyroid ...Read more


Dr. Charles Gordon
210 doctors shared insights

Levoxyl (Definition)

Levoxyl is a thyroid ...Read more