The thyroid medication levothyroxine should be taken on an empty stomach at around the same time every day. You should avoid ...

Levothyroxine sodium 100mcg ... colestipol), ion exchange resins (eg, kayexalate). Thyroid levels may be affected by clofibrate, estrogens, heroin, methadone, 5-fluorouracil, mitotane, tamoxifen ...

Thyroid diseases ... with pregnancy increasing levothyroxine requirements in most women treated for hypothyroidism. Hyperthyroidism is often treated with antithyroid drugs in pregnancy.

Standard dosing algorithms could be responsible for the higher rates of thyrotoxicosis among older women vs men prescribed levoythroxine.

There has been general agreement about the equivalent dosage of desiccated thyroid ... of sodium levothyroxine . . . From the Endocrine Clinic and Department of Medicine, Beth Israel Hospital.