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Nancie,

You wrote:

> ... The higher doses

> in the allopathic world are considered off label uses which happens ALL the

> time with other medications and no one says boo....

Actually, the Code of Federal Regulations says a lot more than boo. For

example, it requires that, " If physicians use a product for an

indication not in the approved labeling, they have the responsibility to

be well informed about the product, to base its use on firm scientific

rationale and on sound medical evidence, and to maintain records of the

product's use and effects. " Many hospitals and universities require IRB

or other institutional oversight for off label uses.

Further, if the off label use is part of a clinical study protocol or

investigation, 21 CFR 312.2(B)(1) requires submission of an IND

(Investigational New Drug Application) and all the accompanying

rigmarole, unless a list of requirements are met, one of which is full

informed consent of the patient.

I think was acting in the spirit of that law, in wanting everyone

to be aware that over 3 grains of Armour was an exceptional prescription

and not at all usual, as Gracia always claims. I am confident that

Forest's statement that most people respond to 1-2 grains is based on

real statistical records and not a wild guess or exaggeration to protect

themselves, since Federal law requires them to keep and report those

records.

Chuck

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horse puckey. very few peeps have success on 1--2 grains. try it yourself

and see how you like it.

Gracia

I think was acting in the spirit of that law, in wanting everyone

to be aware that over 3 grains of Armour was an exceptional prescription

and not at all usual, as Gracia always claims. I am confident that

Forest's statement that most people respond to 1-2 grains is based on

real statistical records and not a wild guess or exaggeration to protect

themselves, since Federal law requires them to keep and report those

records.

Chuck

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Well I guess I am one of those peeps, because I was at my best when I was

taking 2 grains. I never felt better and I took it with food. I had plenty

of energy and was doing yoga in the morning and a one mile walk daily. I

lost 27 lbs in 6 weeks on that amount.

Now trying to prove it to my Doc to put me back on the 2 grains. I go for my

tests this Saturday. My Doc is finally believing that armour works for me

better.

Betty

Re: Off label uses

>

>

>

>

> horse puckey. very few peeps have success on 1--2 grains. try it

> yourself and see how you like it.

>

> Gracia

>

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Betty, that is AWESOME ‹ 27 lbs in 6 weeks, way to go :)

Glad you are feeling good on what you take as well ‹ it¹s always great to

hear that.

sue

On 8/11/08 3:45 PM, " Betty " <bjshamrock@...> wrote:

>

>

>

> Well I guess I am one of those peeps, because I was at my best when I was

> taking 2 grains. I never felt better and I took it with food. I had plenty

> of energy and was doing yoga in the morning and a one mile walk daily. I

> lost 27 lbs in 6 weeks on that amount.

>

> Now trying to prove it to my Doc to put me back on the 2 grains. I go for my

> tests this Saturday. My Doc is finally believing that armour works for me

> better.

>

> Betty

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Chuck, I have found a couple of places [Forest Pharmaceuticals site and

{I think} Armourthyroid.com on which dosage with Armour are discussed.

On both sites I note that 3 grains [180 mg] is the maximum dosage

listed; however the wording does not seem to be specific that 180 mg is

the maximum allowed dosage. While I do not understand the reasoning

behind taking so much more T3 and T4 than a healthy person makes [after

all, it IS suppose to be a replacement program???] I don't see a place

that specifically says no one should take more than 3 grains. Do you

have such a reference, or are you relying upon the same info that I've

found?

Thanks,

> I think was acting in the spirit of that law, in wanting everyone

> to be aware that over 3 grains of Armour was an exceptional prescription

> and not at all usual, as Gracia always claims. I am confident that

> Forest's statement that most people respond to 1-2 grains is based on

> real statistical records and not a wild guess or exaggeration to protect

> themselves, since Federal law requires them to keep and report those

> records.

>

> Chuck

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Gracia,

You wrote:

>

> horse puckey. very few peeps have success on 1--2 grains. try it

> yourself and see how you like it.

>

Again, the wording in Forest's dosing guidelines suggest that they were

looking at the frequency distribution of Armour prescriptions, which

evidently run well over 2,000,000 per year. On what size data base did

you base your " horse puckey " evaluation?

However, there are several old studies that came to the same

conclusions. The oldest were summarized in a book by the endocrinologist

and researcher, H. Hutton:

_Practical Endocrinology_, Springfield, C. , 1966.

Hutton was actually an advocate of Armour at a time when Synthroid had

taken over the market. He said, " Thyroid is a much maligned agent.

Certainly it should be administered only under the supervision of a

physician, but the danger likely to result from taking it has been

portrayed in such lurid fashion that many medical men seem hesitant

about giving it. As a matter of fact, overdosage seldom occurs. Signs of

such an event are so easily recognized before any damage is done that

any medical man should use it wherever he believes it is indicated. "

For dosing, he said, " The tachycardia, tremor, palpitation and increased

nervousness [from overdosage] are easily recognized so that one may

accurately administer it without resorting to frequent determination of

the BMR, etc. The tolerance for it varies over an extremely wide range

with different patients. Patients much in need of it may tolerate less

than one grain [of desiccated thyroid] per day, others who seem to need

it no worse, tolerate up to 60 grains per day without any discernible

ill effects. This, of course, could have been due to a difference in

absorption of the drug from the gut. "

However, Hutton concluded that 120-to-180 mg (approximately 2-to-3

grains) daily was optimal for almost all myxedematous patients, the most

severe condition, according to your ancient Merck Manual.

Here is a more recent study: Wren, J.C. " Symptomatic atherosclerosis:

prevention or modification by treatment with desiccated thyroid. " J Am

Geriatr Soc 1971;19:7-22.

Wren administered desiccated thyroid for five years to 132 patients

with symptomatic atherosclerosis. The initial dose was 15-30 mg

daily, which was increased gradually over a six month period, based on

clinical judgment and individual tolerance. Wren reported that in the

majority of cases, the final daily dose was 120 or 180 mg, again spot on

with Forest's guidelines.

Chuck

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Chuck docs do not Rx Armour properly. this system is dysfunctional so we

cannot extrapolate a lot from it. tachycardia , nervousness, palpitation are

adrenal symptoms.

Gracia

Gracia,

You wrote:

>

> horse puckey. very few peeps have success on 1--2 grains. try it

> yourself and see how you like it.

>

Again, the wording in Forest's dosing guidelines suggest that they were

looking at the frequency distribution of Armour prescriptions, which

evidently run well over 2,000,000 per year. On what size data base did

you base your " horse puckey " evaluation?

However, there are several old studies that came to the same

conclusions. The oldest were summarized in a book by the endocrinologist

and researcher, H. Hutton:

_Practical Endocrinology_, Springfield, C. , 1966.

Hutton was actually an advocate of Armour at a time when Synthroid had

taken over the market. He said, " Thyroid is a much maligned agent.

Certainly it should be administered only under the supervision of a

physician, but the danger likely to result from taking it has been

portrayed in such lurid fashion that many medical men seem hesitant

about giving it. As a matter of fact, overdosage seldom occurs. Signs of

such an event are so easily recognized before any damage is done that

any medical man should use it wherever he believes it is indicated. "

For dosing, he said, " The tachycardia, tremor, palpitation and increased

nervousness [from overdosage] are easily recognized so that one may

accurately administer it without resorting to frequent determination of

the BMR, etc. The tolerance for it varies over an extremely wide range

with different patients. Patients much in need of it may tolerate less

than one grain [of desiccated thyroid] per day, others who seem to need

it no worse, tolerate up to 60 grains per day without any discernible

ill effects. This, of course, could have been due to a difference in

absorption of the drug from the gut. "

However, Hutton concluded that 120-to-180 mg (approximately 2-to-3

grains) daily was optimal for almost all myxedematous patients, the most

severe condition, according to your ancient Merck Manual.

Here is a more recent study: Wren, J.C. " Symptomatic atherosclerosis:

prevention or modification by treatment with desiccated thyroid. " J Am

Geriatr Soc 1971;19:7-22.

Wren administered desiccated thyroid for five years to 132 patients

with symptomatic atherosclerosis. The initial dose was 15-30 mg

daily, which was increased gradually over a six month period, based on

clinical judgment and individual tolerance. Wren reported that in the

majority of cases, the final daily dose was 120 or 180 mg, again spot on

with Forest's guidelines.

Chuck

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,

You wrote:

> ... I don't see a place

> that specifically says no one should take more than 3 grains....

Forest leaves the door open by saying that if you need more than 3

grains, it suggests compliance or absorption problems. It could also

mean that something else is going on.

All the studies I cited earlier included cases that needed more than 3

grains. However, they all concluded that for the vast majority of cases,

no more than 3 grains was needed.

I also saw a paper by Dr. Lowe criticizing another by the AACE, but it

had a breakdown by how many were symptom free when the tests showed them

to be euthyroid. The AACE concluded they should just let this <10% or so

suffer, because the dangers of hyperT outweighed the hypoT they were

suffering. Lowe argued for giving them enough hormone to suppress the

symptoms, regardless of the tests.

At any rate, there are at least a few percent that seem to need more

than 3 grains.

Chuck

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You can download the recommendations directly from the manufacturer here:

http://www.frx.com/pi/armourthyroid_pi.pdf

Look under " DOSAGE AND ADMINISTRATION "

" ...The usual starting dose is 30 mg Armour Thyroid, with increments of

15 mg every 2 to 3 weeks...

....Most patients require 60 to 120 mg/day...

...Maintenance dosages of 60 to 120 mg/day usually result in normal

serum T4 and T3 levels... "

End of quote.

Your information is at odds to what Forest Pharmaceuticals publishes.

Perhaps you [and others] for some unknown reason DO need more T4 and T3

than a healthy body produces [then another question would be: Why?].

However, there is a lot of info on their page discussing negatives from

excessive use. I still think that in order to be fair to those whom you

advise to ignore the manufacturer's recommendations that you should at

least be sure they know that they are exceeding those recommendations.

How would you feel if someone took your advice and was seriously harmed

or died??? Some of the warnings on the referenced page sound quite serious.

> horse puckey. very few peeps have success on 1--2 grains. try it

> yourself and see how you like it.

>

> Gracia

> I think was acting in the spirit of that law, in wanting everyone

> to be aware that over 3 grains of Armour was an exceptional prescription

> and not at all usual, as Gracia always claims. I am confident that

> Forest's statement that most people respond to 1-2 grains is based on

> real statistical records and not a wild guess or exaggeration to protect

> themselves, since Federal law requires them to keep and report those

> records.

>

> Chuck

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Not according to Forest Pharmaceuticals web site...

>

> Chuck docs do not Rx Armour properly. this system is dysfunctional so

> we cannot extrapolate a lot from it. tachycardia , nervousness,

> palpitation are adrenal symptoms.

> Gracia

>

> Gracia,

>

> You wrote:

> >

> > horse puckey. very few peeps have success on 1--2 grains. try it

> > yourself and see how you like it.

> >

>

> Again, the wording in Forest's dosing guidelines suggest that they were

> looking at the frequency distribution of Armour prescriptions, which

> evidently run well over 2,000,000 per year. On what size data base did

> you base your " horse puckey " evaluation?

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It seems that way; but most certainly not EVERYONE.

And then I wonder: Why would ANYONE need more than a full replacement

dose??? Why do some people get hyper symptoms on 2 or 3 grains and some

take 6 grains with no apparent negative symptoms???

> At any rate, there are at least a few percent that seem to need more

> than 3 grains.

>

> Chuck

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it has to do with cell sensitvity, and with how the body uses hormones. not

being able to tolerate thyroid meds or being able to tolerate a high dose with

not much effect both indicate poor adrenal function. I think iodine has

something to do with it too.

Gracia

p.s. undertreatment is soooo common--my coworker is very undertreated on 2

grains.

It seems that way; but most certainly not EVERYONE.

And then I wonder: Why would ANYONE need more than a full replacement

dose??? Why do some people get hyper symptoms on 2 or 3 grains and some

take 6 grains with no apparent negative symptoms???

> At any rate, there are at least a few percent that seem to need more

> than 3 grains.

>

> Chuck

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Chuck-

We use off label uses all the time without the need for IRB or instructional

oversight. It is called evidence based medicine and the usage of these off

label uses is via clinical research. All it takes is a TAR with references

of clinical research and evidence based medicine. Only people who are not

providers make a bloody deal out of it.

-- Off label uses

Nancie,

You wrote:

> ... The higher doses

> in the allopathic world are considered off label uses which happens ALL

the

> time with other medications and no one says boo....

Actually, the Code of Federal Regulations says a lot more than boo. For

example, it requires that, " If physicians use a product for an

indication not in the approved labeling, they have the responsibility to

be well informed about the product, to base its use on firm scientific

rationale and on sound medical evidence, and to maintain records of the

product's use and effects. " Many hospitals and universities require IRB

or other institutional oversight for off label uses.

Further, if the off label use is part of a clinical study protocol or

investigation, 21 CFR 312.2(B)(1) requires submission of an IND

(Investigational New Drug Application) and all the accompanying

rigmarole, unless a list of requirements are met, one of which is full

informed consent of the patient.

I think was acting in the spirit of that law, in wanting everyone

to be aware that over 3 grains of Armour was an exceptional prescription

and not at all usual, as Gracia always claims. I am confident that

Forest's statement that most people respond to 1-2 grains is based on

real statistical records and not a wild guess or exaggeration to protect

themselves, since Federal law requires them to keep and report those

records.

Chuck

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wrote:

>

>

> Typo???

>

No, that was carefully transcribed. However, this was before they knew

about calcium, iron, soy, goitrogens, and just plain old food

interference. Evidently someone really did try taking 60 mg per day with

no ill effects. As the author speculated, though, there may well have

been absorption issues.

Chuck

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,

You wrote:

>

> Not according to Forest Pharmaceuticals web site...

Or the Merck Manual. Here are the symptoms of hyperthyroidism, whether

due to Grave's or hormone overdose. Note that all of the symptoms that

Gracia (and others) call adrenal, are classed as typical of hyperT:

" Many common symptoms and signs of hyperthyroidism are similar to those

of adrenergic excess, such as nervousness, palpitations, hyperactivity,

increased sweating, heat hypersensitivity, fatigue, increased appetite,

weight loss, insomnia, weakness, and frequent bowel movements

(occasionally diarrhea). Hypomenorrhea may be present. Signs may include

warm, moist skin; tremor; tachycardia; widened pulse pressure; atrial

fibrillation; and palpitations.

Elderly patients, particularly those with toxic nodular goiter, may

present atypically (apathetic or masked hyperthyroidism) with symptoms

more akin to depression or dementia. Most do not have exophthalmos or

tremor. Atrial fibrillation, syncope, altered sensorium, heart failure,

and weakness are more likely. Symptoms and signs may involve only a

single organ system.....

.... Thyroid storm produces abrupt florid symptoms of hyperthyroidism

with one or more of the following: fever, marked weakness and muscle

wasting, extreme restlessness with wide emotional swings, confusion,

psychosis, coma, nausea, vomiting, diarrhea, and hepatomegaly with mild

jaundice. The patient may present with cardiovascular collapse and

shock. Thyroid storm is a life-threatening emergency requiring prompt

treatment. "

Here are the symptoms of hypothyroidism from the Merck. Note that many

of these have also been ascribed to adrenal insufficiency.

" Symptoms may include cold intolerance, constipation, forgetfulness, and

_personality changes_. Modest weight gain is largely the result of fluid

retention and decreased metabolism. Paresthesias of the hands and feet

are common, often due to carpal-tarsal tunnel syndrome caused by

deposition of proteinaceous ground substance in the ligaments around the

wrist and ankle. Women with hypothyroidism may develop menorrhagia or

secondary amenorrhea.

The facial expression is dull; the voice is hoarse and speech is slow;

facial puffiness and periorbital swelling occur due to infiltration with

the mucopolysaccharides hyaluronic acid and chondroitin sulfate; eyelids

droop because of decreased adrenergic drive; hair is sparse, coarse, and

dry; and the skin is coarse, dry, scaly, and thick. The relaxation phase

of deep tendon reflexes is slowed. Hypothermia is common. Dementia or

frank psychosis (myxedema madness) may occur. In the elderly,

hypothyroidism may mimic dementia or parkinsonism.

Carotenemia is common, particularly notable on the palms and soles,

caused by deposition of carotene in the lipid-rich epidermal layers.

Deposition of proteinaceous ground substance in the tongue may produce

macroglossia. A decrease in both thyroid hormone and adrenergic

stimulation causes bradycardia. The heart may be enlarged, partly

because of dilation but chiefly because of pericardial effusion. Pleural

or abdominal effusions also may be noted. The pericardial and pleural

effusions develop slowly and only rarely cause respiratory or

hemodynamic distress.... "

Chuck

>

> >

> > Chuck docs do not Rx Armour properly. this system is dysfunctional so

> > we cannot extrapolate a lot from it. tachycardia , nervousness,

> > palpitation are adrenal symptoms.

> > Gracia

> >

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Nancie,

You wrote:

>

> We use off label uses all the time without the need for IRB or instructional

> oversight.

That's because those are for institutions, not private practices. I

happen to serve on a committee that reviews research proposals involving

human subjects with very similar restrictions. It depends on the

institution and whether they hope to land federal research grants.

> ...It is called evidence based medicine and the usage of these off

> label uses is via clinical research. All it takes is a TAR with references

> of clinical research and evidence based medicine. Only people who are not

> providers make a bloody deal out of it.

Yes, it is different for pay as you go private practices than for

institutional ones. The TAR is to get the off-label use covered by

medical insurance. Many providers will not pay for certain off label

uses, especially the controversial ones.

Chuck

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Again it depends. My rheum at UCLA is Chief of rheumatology and she uses

meds off label all the time in the treatment of sle. That is OK with UCLA.

As far as insurx goes- as long as you document the hell out of the TAR [ I

have written over 100 Tar's]- the insurx covers it . I have a 95% success

rate. Granted it is a lot of work- but I do charge for the extra time and

the patients pay that willingly.

-- Re: Off label uses

Nancie,

You wrote:

>

> We use off label uses all the time without the need for IRB or

instructional

> oversight.

That's because those are for institutions, not private practices. I

happen to serve on a committee that reviews research proposals involving

human subjects with very similar restrictions. It depends on the

institution and whether they hope to land federal research grants.

> ...It is called evidence based medicine and the usage of these off

> label uses is via clinical research. All it takes is a TAR with references

> of clinical research and evidence based medicine. Only people who are not

> providers make a bloody deal out of it.

Yes, it is different for pay as you go private practices than for

institutional ones. The TAR is to get the off-label use covered by

medical insurance. Many providers will not pay for certain off label

uses, especially the controversial ones.

Chuck

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It still seems strange to me to suggest that someone needs to take a

replacement dose of anything that is twice that produced by a healthy

body. About the only thing I can see is that possibly some people are

only 50% efficient in utilizing T3 and/or T4.

I know that T4/T3 conversion problems have been discussed; as well as

binding problems [i think with T3?]. But could these or any other known

condition cause T3 usage to only be 50% or so efficient? Is there a

specific known illness with this effect? What other condition could

make someone need twice the T3 produced by a healthy body?

I guess one possibility [maybe remote] is that the possible damage of an

undetermined nature from long term lack of hypothyroid treatment that

Chuck and others have speculated on may cause such a condition. But I

know of no credible support for such an idea.

> it has to do with cell sensitvity, and with how the body uses

> hormones. not being able to tolerate thyroid meds or being able to

> tolerate a high dose with not much effect both indicate poor adrenal

> function. I think iodine has something to do with it too.

> Gracia

> p.s. undertreatment is soooo common--my coworker is very undertreated

> on 2 grains.

>

> It seems that way; but most certainly not EVERYONE.

>

> And then I wonder: Why would ANYONE need more than a full replacement

> dose??? Why do some people get hyper symptoms on 2 or 3 grains and some

> take 6 grains with no apparent negative symptoms???

>

>

>

> > At any rate, there are at least a few percent that seem to need more

> > than 3 grains.

> >

> > Chuck

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Perhaps it is not as strange when you consider when Forest wrote the

word " malabsorption " in their PDF. Imagine a world where hypothyroid

people do not digest as well, people that have had colon cancer and had

their bowels resectioned, people that have had gastric bypass

operations, people with weird stomach acid problems, people that have

had stomach cancer.....the list is endless. That is why Forest wisely

never uses the word....maximum. Maximum... " The greatest possible

quantity or degree. "

Thyroid replacement medication enters the body in a different fashion

then the way our own thyroids contribute, so you cannot compare apples

to oranges.

Neil

wrote:

>

> It still seems strange to me to suggest that someone needs to take a

> replacement dose of anything that is twice that produced by a healthy

> body. About the only thing I can see is that possibly some people are

> only 50% efficient in utilizing T3 and/or T4.

>

> I know that T4/T3 conversion problems have been discussed; as well as

> binding problems [i think with T3?]. But could these or any other known

> condition cause T3 usage to only be 50% or so efficient? Is there a

> specific known illness with this effect? What other condition could

> make someone need twice the T3 produced by a healthy body?

>

> I guess one possibility [maybe remote] is that the possible damage of an

> undetermined nature from long term lack of hypothyroid treatment that

> Chuck and others have speculated on may cause such a condition. But I

> know of no credible support for such an idea.

>

>

>

> > it has to do with cell sensitvity, and with how the body uses

> > hormones. not being able to tolerate thyroid meds or being able to

> > tolerate a high dose with not much effect both indicate poor adrenal

> > function. I think iodine has something to do with it too.

> > Gracia

> > p.s. undertreatment is soooo common--my coworker is very undertreated

> > on 2 grains.

> >

> > It seems that way; but most certainly not EVERYONE.

> >

> > And then I wonder: Why would ANYONE need more than a full replacement

> > dose??? Why do some people get hyper symptoms on 2 or 3 grains and some

> > take 6 grains with no apparent negative symptoms???

> >

> >

> >

> > > At any rate, there are at least a few percent that seem to need more

> > > than 3 grains.

> > >

> > > Chuck

>

>

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Chuck, the original said: " ... it no worse, tolerate up to 60 grains per

day without any discernible ill effects. "

I don't get the correlation of 60 GRAINS to 60 mg???

Thanks,

> wrote:

> >

> >

> > Typo???

> >

>

> No, that was carefully transcribed. However, this was before they knew

> about calcium, iron, soy, goitrogens, and just plain old food

> interference. Evidently someone really did try taking 60 mg per day with

> no ill effects. As the author speculated, though, there may well have

> been absorption issues.

>

> Chuck

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,

Sorry, the 60 mg is the typo. Someone did take 60 grains with no ill

effects. Since each grain is supposed to be equivalent to 100 mcg of T4,

that would effectively be 6,000 mcg of levothyroxine.

Chuck

You wrote:

>

>

> Chuck, the original said: " ... it no worse, tolerate up to 60 grains per

> day without any discernible ill effects. "

>

> I don't get the correlation of 60 GRAINS to 60 mg???

>

> Thanks,

>

>

> > wrote:

> > >

> > >

> > > Typo???

> > >

> >

> > No, that was carefully transcribed. However, this was before they knew

> > about calcium, iron, soy, goitrogens, and just plain old food

> > interference. Evidently someone really did try taking 60 mg per day with

> > no ill effects. As the author speculated, though, there may well have

> > been absorption issues.

> >

> > Chuck

>

>

>

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60 mg or 1 grain is 38 of T4 + 9 of T3 (x4) 36 = 74 mcg of levo equivalent

roughly

For some reason Armour¹s site rounds it up to a 100 mcg levo tab Œsted of

the .88.

sue

On 8/13/08 4:18 PM, " Chuck B " <gumboyaya@...> wrote:

>

>

>

> ,

>

> Sorry, the 60 mg is the typo. Someone did take 60 grains with no ill

> effects. Since each grain is supposed to be equivalent to 100 mcg of T4,

> that would effectively be 6,000 mcg of levothyroxine.

>

> Chuck

>

> You wrote:

>> >

>> >

>> >

>

> on

>

>

> find out more.

>

>

>

>

> .

>

>

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Sue,

You wrote:

>

>

> 60 mg or 1 grain is 38 of T4 + 9 of T3 (x4) 36 = 74 mcg of levo equivalent

> roughly

> For some reason Armour¹s site rounds it up to a 100 mcg levo tab Œsted of

> the .88.

Armour also contains T2, T1, and some of the bound fractions. The 100

mcg equivalence is based on a test of how much TSH changes in response

to controlled doses. In addition to being equivalent to 4 times the T4,

T3 tends to spike in concentration which temporarily drives TSH below

the equilibrium (4 times) level. That combined with the other active

forms makes it appear to be much more potent than 74 mcg.

And, they probably rounded up. :)

Chuck

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True it does contain T1 and T2 so that could be it.

sue

On 8/13/08 5:27 PM, " Chuck B " <gumboyaya@...> wrote:

> Sue,

>

> You wrote:

>>

>>

>> 60 mg or 1 grain is 38 of T4 + 9 of T3 (x4) 36 = 74 mcg of levo equivalent

>> roughly

>> For some reason Armour¹s site rounds it up to a 100 mcg levo tab Œsted of

>> the .88.

>

> Armour also contains T2, T1, and some of the bound fractions. The 100

> mcg equivalence is based on a test of how much TSH changes in response

> to controlled doses. In addition to being equivalent to 4 times the T4,

> T3 tends to spike in concentration which temporarily drives TSH below

> the equilibrium (4 times) level. That combined with the other active

> forms makes it appear to be much more potent than 74 mcg.

>

> And, they probably rounded up. :)

>

> Chuck

>

>

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