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Doctor insights on: Long Term Effects Of Synthroid

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How long after getting proper dose of synthroid (thyroxine) should I begin to feel less symptomatic? last tsh was 23.

How long after getting proper dose of synthroid (thyroxine) should I begin to feel less symptomatic? last tsh was 23.

Usually on the order: Of two to three weeks. But I should warn you there are some patients that some neuromuscular and psychiatric symptoms can take months to resolve. It's also possible that some symptoms thought to be related to hypothroidism like fatigue or weight, may in fact be related to other factors/issues, even when the hypothyroidism is corrected. ...Read more

Dr. David Sneid
1,375 doctors shared insights

Thyroxine (Definition)

Thyroxine is a thyroid ...Read more


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What are the long term effects of synthroid (thyroxine)? I've read about connections to cancer.

What are the long term effects of synthroid (thyroxine)?  I've read about connections to cancer.

No connection: with cancer . People with a history of thyroid cancer often take synthroid (thyroxine) for the rest of their lives. Synthroid (thyroxine) is T-4 a form of thyroid hormone! ...Read more

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If our on-demand delivery of drugs like Synthroid (thyroxine) were interrupted by economic collapse, what could I do to acquire my med? Can i stock it long term?

If our on-demand delivery of drugs like Synthroid (thyroxine) were interrupted by economic collapse, what could I do to acquire my med? Can i stock it long term?

Don't worry: ' be a bull not a a bear ' will not going to a economic collapse, if it happens unfortunately we have to worry more issues than availability of synthroid (thyroxine) , ii you want you can stock , but no need for it. ...Read more

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Can asgwaghanda be taken long term? Me thyroid dr told me 2 stop taking levoxyl (thyroxine) because my body is producing enough. He knows I take this herb

Can asgwaghanda be taken long term? Me thyroid dr told me 2 stop taking levoxyl (thyroxine) because my body is producing enough.  He knows I take this herb

There is no: scientific information to confirm ANY benefits to taking asgwaghanda. There is no way to confirm that your thyroid levels would be normal without replacement if the lab tests were drawn while you were receiving replacement. The only way to tell for sure is to be totally off replacement for at least six weeks before lab is drawn. ...Read more

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After long term Synthroid (thyroxine) over dose of 200mcg for 5 years how long will it be till i feel better? Lowered to 175 cancer suppression.

After long term Synthroid (thyroxine) over dose of 200mcg for 5 years how long will it be till i feel better? Lowered to 175 cancer suppression.

patience required: With history of cancer (? Thyroid you did not mention ) , TSH stimulates not only thyroid cell also cancer cell , (tsh levels 0.3 to 3) need to know your age and weight , status of tumor to calculate the dose, 200 mcg i don't think is over dose, always needs adjustment , you may have associated diseases , speak to your doctor will make you better with other medication good luck. ...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?

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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Just started on synthroid (thyroxine) (finally!!!) how long before symptoms improve (cold intolerance, brittle nails, hair falling out, constipation? What side effects should I watch for or expect? How long before dose increase?

Just started on synthroid (thyroxine) (finally!!!) how long before symptoms improve (cold intolerance, brittle nails, hair falling out, constipation? What side effects should I watch for or expect? How long before dose increase?

I usually advise: my thyroid patients that it may be SEVERAl WEEKS for them to notice a "difference" and THAT is when I re-check the tests at 2 weeks to begin with! The "cold intolerance " is usually the first to "respond" BE PATIENT!!! It may take several visits before your problem is "sorted out" Hope this helps! Dr Z ...Read more

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Synthroid (thyroxine) withdrawal lasts for how long?

It depends on how lo: It depends on how long and how much dose you have been on synthroid (thyroxine).It can take few days to few weeks. ...Read more

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How long does thyroxine stay in your system? Thank you!

How long does thyroxine stay in your system? Thank you!

Weeks: Half-life elimination is 6–7 days for euthyroid patients; 9–10 days for hypothyroid patients; 3–4 days for hyperthyroid patients. That means that 1/2 of the drug hormone/medication still remains in the person 6-7 days after stopping the medication. The medication Levothyroxine is chemically the same as the naturally produced hormone thyroxine by the thyroid gland. ...Read more

Dr. Joseph Mathews
592 doctors shared insights

Synthroid (Definition)

Synthroid is a thyroid ...Read more