| Synthroid | GSK Original Formulation |
|---|---|
| Levothyroxine sodium acacia confectioner's sugar (contains corn starch) lactose monohydrate magnesium stearate povidone talc | Levothyroxine sodium magnesium stearate lactose monohydrate maize starch acacia |
| GSK New Formulation | Almus |
| Levothyroxine sodium magnesium stearate microcrystalline cellulose pre-gelatinized maize starch purified talc silicon dioxide (Colloidal anhydrous silica) | Levothyroxine lactose magnesium stearate maize starch stearic acid |
| Forleys GS | ELTROXIN (Goldshield) |
| Levothyroxine sodium citrate lactose maize starch acacia powder magnesium stearate purified water | Thyroxine Sodium BP Sodium Citrate Lactose Maize starch Powdered Acacia Magnesium Stearate Purified water |
| Whole Thyroid Extract (Naturethroid) | |
| Porcine Thyroid Powder, U.S. Pharmacopeia Microcrystalline Cellulose Dicalcium Phosphate Sodium Starch Glycolate Magnesium Stearate Hydroxypropyl Methylcellulose Stearic Acid Carnauba Wax Polyethylene Glycol | |
| THYROLAR or liotrix is not natural desiccated thyroid.It is synthetic T3 (L-triiodothyronine) and synthetic T4 (levothyroxine sodium) with a ratio of four parts T4 to one part T3. It contains no T2, T1 or calcitonin. The tablets need to be kept refrigerated. | |
| INGREDIENT EXPLANATIONS: Microcrystalline Cellulose - synthetically derived fibre base (similar to plant-derived). It is typically used as a filler in tablets to provide volume and bulk. Dicalcium Phosphate - derived from a mined ore. It is typically used as a binder in tablets to hold all the ingredients during compression. Colloidal Silicon Dioxide - derived from a mined ore. Typically used as a natural desiccant intablets to provide a barrier from moisture and humidity. Sodium Starch Glycolate - Synthetically derived starch molecule (similar to potato starch). It is typically used as a disintegrating agent in tablets to aid in proper disintegration of the tablet in the stomach. Magnesium Stearate - Derived from a vegetable source (typically palm oil). It is typically used as a lubricating agent in tablets to aid in proper compression of the tablet. Hydroxypropyl Methylcellulose - Derived from a plant cellulose base (typically cotton blend or wood pulp). It is typically used as a granulating agent in tablets to provide bulk and density to the tablet for proper compression, as well as part of a clear coating solution (with PEG). Polysorbate 80 - An inactive water soluable emulsifying agent which blends the ingredients of mixtures and prevents separating. Stearic Acid - derived from a vegetable source (typically palm oil). It is typically used as a binder in tablets to hold all the ingredients during compression). Carnauba Wax - derived from the pores of the leaves of the Brazilian wax palm tree. It is used in the final stage in tablet coating to provide a complete seal. Polyethylene Glycol (PEG) - Synthetically derived, water-soluble, waxy solid. It is used with Hydroxypropyl Methylcellulose as part of the clear coating solution. Lactose Monohydrate - Present in traceable amounts as part of Thyroid USP (diluent) | |