ARMOUR (Armour was reformulated in 2009, supposedly decreasing the amount of dextrose and increasing cellulose. As a result, numerous patients report problems with it and a return of hypo symptoms. Many are switching to Naturethroid or Canadas Erfa and are not recommending others use Armour. Others are finding that CHEWING the tablet, or pulverizing it and adding honey, helps). Its made by Forest Pharmaceuticals. It is made in the following strengths: 1/4, 1/2, 1, 2, 3, 4 and 5 grain tablets. The 3 and 5 grain tabs are scored., One grain is 60 mg and contains 38 mg of T4 and 9 mcg of T3, plus unmeasured amounts of T2, T1 and calcitonin. The latter three are not removed, as rumor occasionally states. Each tablet contains:
Porcine Thyroid Powder, U.S. Pharmacopeia
Dextrose, Anhydrous (anhydrous means any water has been removed and makes the tablet more stable)
Microcrystalline Cellulose, NF
Sodium Starch Glycolate, NF
Calcium Stearate NF (stabilizer and lubricant)
Opadry White (Titanium dioxide used as whitening agent, but also contains trace amounts of PEG (polyethylene glycol), Polysorbate 80, and Hydroxypropyl Methycellulose. See below.) Armour Thyroid does not contain gluten or lactose. But neither do Naturethroid or Westhroid.
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CANADAS THYROID, formerly by Phizer and is now by Erfa. They come in 30, 60 and 125 mg tablets. They contain:
Erfas Canadian Thyroid has slightly different ratios than the USP ratios of US brands:
In each Erfa 30 mg tablet embossed ECI 30, there is 18 mcg. of T4 and 4 mcg. of T3 (as compared to 19/4.5 in US brands) This is equivalent to the US one-half grain.
In each Erfa 60 mg tablet embossed ECI 60, there is 35 mcg. of T4 and 8 mcg. of T3 (as compared to 38/9 in US brands) This is equivalent to the US one grain.
In each Erfa 125 mg tablet embossed ECI 125, there is 73 mcg. of T4 and 17 mcg. of T3 (as compared to 76/18 in US brands) This is equivalent to the US two grains.
http://www.erfa-sa.com/thyroid_en.htm, plus they have a question & answer forum:
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DENMARKS THYREOïDUM from Biofac in Kastrup, Denmark. Imported into the Netherlands from BUFA/Fargo, importers of pharmaceutical products.
œ grain = 29 mg (12.7 mcg T4 and 4.5 mcg T3)
1 grain = 57 mg (25.3 mcg T4 and 9 mcg T3)
2 grain = 114 mg (50.6 mcg T4 and 18 mcg T3)
Pig thyroid. Some websites state the T4/T3 ratio can vary from 2.3: 1 to 3.8: 1 depending on the lot. Meets standards of US Pharmacopoeia. Contains Microcrystalline cellulose as a filler. Also may contain lactose, sodium, chloride, starch, sucrose or glucose.