Levo-T (Levothyroxine Sodium Tablets) Drug Information: Description, User Reviews, Drug Side Effects, Interactions

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May 27, 2012

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Levo-T

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Levo-T™
(levothyroxine sodium) Tablets, USP

DRUG DESCRIPTION

Levo-T™ (levothyroxine sodium tablets, USP) contain synthetic crystalline L-3,3',5,5'-

tetraiodothyronine sodium salt [levothyroxine (T₄) sodium]. Synthetic T₄ is identical to that produced in the human thyroid gland. Levothyroxine (T₄) sodium has an empirical formula of C₁₅H₁₀I₄N NaO₄•H₂O, molecular weight of 798.86 g/mol (anhydrous), and structural formula as shown:

Levo-T (Levothyroxine Sodium) Structural Formula Illustration

Inactive Ingredients: Magnesium Stearate, NF; Microcrystalline Cellulose, NF; Colloidal Silicone Dioxide, NF; Sodium Starch Glycolate, NF. The following are the color additives by tablet strength:

Strength (mcg)	Color Additive(s)
25	FD&C Yellow No. 6 Aluminum Lake
50	None
75	FD&C Red No. 40 Aluminum Lake
75	FD&C Blue No. 2 Aluminum Lake
88	FD&C Blue No. 1 Aluminum Lake
	D&C Yellow No. 10 Aluminum Lake
	D&C Red No. 30 Aluminum Lake
100	D&C Yellow No. 10 Aluminum Lake
	D&C Red Lake Blend (D&C Red No. 27
	Lake and D&C Red No. 30 Lake)
112	D&C Red No. 27 Aluminum Lake
112	D&C Red No. 30 Aluminum Lake
125	FD&C Yellow No. 6 Aluminum Lake
	FD&C Red No. 40 Aluminum Lake
	FD&C Blue No. 1 Aluminum Lake
150	FD&C Blue No. 2 Aluminum Lake
175	D&C Red No. 27 Aluminum Lake
	D&C Red No. 30 Aluminum Lake
	FD&C Blue No. 1 Aluminum Lake
200	D&C Yellow No. 10 Aluminum Lake
200	D&C Red No. 27 Aluminum Lake
300	D&C Yellow No. 10 Aluminum Lake
	FD&C Yellow No. 6 Aluminum Lake
	FD&C Blue No. 1 Aluminum Lake

What are the precautions when taking levothyroxine sodium tablets (Levo-T)?

Before taking levothyroxine, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: increased thyroid hormones (thyrotoxicosis), decreased adrenal gland function, heart disease (such as coronary artery disease, irregular heartbeat), high blood pressure, diabetes.

Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).

Current information shows that this drug may be used during pregnancy....

Read All Potential Precautions of Levo-T »

Last reviewed on RxList: 7/10/2008
This monograph has been modified to include the generic and brand name in many instances.