Pfizer. Levoxyl (levothyroxine sodium) tablets, for oral use. U.S. Pharmacopeia. USP and FDA working together to protect public health. Smallridge RC, Sangaralingham LR, Mwangi R, et al. Comparison of ...

There is a connection between hypothyroidism and rheumatoid arthritis (RA). Research shows people with RA are more likely to develop underactive thyroid disease, including hypothyroidism and Hashimoto ...

TT4 - Total thyroxine (TT4), or L-thyroxine, increases early in pregnancy. T4 is the thyroid hormone containing 4 atoms of iodine per molecule. Normal serum level in nonpregnant adult is 5-12 mcg/dL.

Subclinical hypothyroidism is defined as a state of relative thyroid dysfunction, characterized by normal serum levels of thyroid hormones and increased serum thyroid-stimulating hormone (TSH ...