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Doctor insights on: Side Effects Of Levothyroxine

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Dr. David Sneid
1,406 doctors shared insights

Thyroxine (Definition)

Thyroxine is a thyroid ...Read more


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How can I find out if I have Addison's disease? Or maybe my symptoms are side effects of levothyroxine?

How can I find out if I have Addison's disease? Or maybe my symptoms are side effects of levothyroxine?

Cortisol: Assessment for adrenal insufficiency involves measurement of blood level of cortisol, and confirming a reduced response of the adrenal gland to produce cortisol after administration of an IV dose of ACTH (cosyntropin). ...Read more

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What are some of the side effects to taking levothyroxine for hypothiroidism?

What are some of the side effects to taking levothyroxine for hypothiroidism?

Safe drug: In general, this is a very safe drug if used properly and as prescribed. The most common side effect is a rash due to the dye in the medication. If too much is used, it can cause palpitations, fast heart beats, nervousness, tremor, diarrhea, insomnia, abdominal cramps... ...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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Was just put on levothyroxine for my thyroid. Are there any side effects to this and are there any pre cautions I should take? Nervous abt taking it

Was just put on levothyroxine for my thyroid. Are there any side effects to this and are there any pre cautions I should take? Nervous abt taking it

Hypothyroidism: Please take levothyroxin early in the morning in empty stomach. You need to check the TSH level within 4- 6 weeks and then every 2-3 months depends on your blood level. ...Read more

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Hey i am a mother of a 6month old with hypothyroidism and i just wanted a second opinion on things.my son just started 0.088 mg levothyroxine.ive read some bad side effects on them im just really worried.

Hey i am a mother of a 6month old with hypothyroidism and i just wanted a second opinion on things.my son just started 0.088 mg levothyroxine.ive read some bad side effects on them im just really worried.

Continue medication: Congenital Hypothyroidism is a lack of the thyroid hormone which is what Levothyroxine provides. All medications have benefits and side effects. Without the treatment your infant will not have normal brain growth and development leading to profound mental retardation. In addition there will be significant impairment in his growth. Delayed treatment can even lead to neurological problems. ...Read more

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Bw revealed TSH 5.89. Put on 25mcg levothyroxine 60 days ago. Having heart palps, lost few lbs when BMI only 17.5. Concerned. Why these side effects?

Call your doctor: Your TSH needs treated, as its elevated but sounds like your having symptoms of too high of a replacement dose -----see your doctor and have your TSH rechecked to be sure. ...Read more

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What are side effects of too much levoxyl (thyroxine)?

What are side effects of too much levoxyl (thyroxine)?

Hyperthyroid: Too much Levoxyl (thyroxine) can give you the symptoms of hyperthyroidism. Most importantly it can cause osteoporosis . You can have a rapid heart rate, tremor, diarrhea , hair loss, elevated blood pressure, anxiety and weight loss among others. It is important if you are on this medication to see your doctor regularly and check your thyroid levels. ...Read more

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What are the common side effects of synthroid (thyroxine)?

What are the common side effects of synthroid (thyroxine)?

There are none: Synthroid (thyroxine) is a man-made replacement for your own thryroid hormone. There are no side effects per se because the drug will bind to the same receptors that your thyroid hormone binds to so the body does not use the drug as a synthetic. It is possible to take too much Synthroid (thyroxine) and then have effects of excess thyroid like rapid heart beat. ...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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How many weeks after beginning 25mcg of Synthroid (thyroxine) can side effects occur?

How many weeks after beginning 25mcg of Synthroid (thyroxine) can side effects occur?

Thyroid treatment: 25 mcg of levothyroxine is a very low dose; a normal dose for hypothyroidism is typically much higher. The only side effect is taking too much (hyperthyroidism: palpitations, sweating, tremor, etc) or not taking enough (hypothyroid: fatigue, cold, etc). But such symptoms can be from other things. You need to get levels checked and talk to the doctor who initially prescribed this. ...Read more

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What are the side effects of levoxyl (thyroxine) hormone?

What are the side effects of levoxyl (thyroxine) hormone?

None: If the dose is appropriate, there should be no side effects of thyroid hormone replacement. The body does not differentiate a normal amount of thyroid hormone coming from your thyroid gland or from a pill. ...Read more

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I have to stop taking Synthroid (thyroxine) for a thryroid scan test. What are the side effects, I have been on medication for 8 years?

I have to stop taking Synthroid (thyroxine) for a thryroid scan test.  What are the side effects, I have been on medication for 8 years?

Fatigue: Main symptom would likely be fatigue. May get constipated, palpitations, restless feelings, being grumpy. But if u'r doc ordered I strongly suggest u follow up. It's only a week, and u may not even experience much. ...Read more

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My 4 year old took 8 of my 200mcg synthroid (thyroxine). The p.A.-c said it would not bother him. But I am still worried. Is there instant side effects or longer?

Overdose: Call poison control right now. They will calculate how much he got according to his weight and they will tell you what you need to do and what symptoms he/she may have. Any time your child takes medications not prescribed for him/her always call poison control right away. The number should be in the front of your phone book. ...Read more

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Is one of the side effects of levoxyl (thyroxine) insomnia?

Theoretically: This is medication used to treat hypothyroid or thryoid replacement. Usually taken first thing in morning without other medications. If thyroid levels are up too high, can see insomnia. Usually the medication itself does not cause significant degree of insomnia. ...Read more

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Levothyroxine (Definition)

Of the hormone produced by one's own ...Read more