Oral Contraceptives + Levothyroxine And Liothyronine Interaction
Moderateinteraction on record
Description
Estrogen-containing oral contraceptives increase serum thyroxine-binding globulin, potentially decreasing free levothyroxine. Patients without functioning thyroid may require increased thyroid dose.
Mechanism
Increases serum thyroxine-binding globulin
Source: NLP:levothyroxine, liothyronine