Thyrolar 12.5 Levothyroxine Sodium Lanthanum Carbonate
ModerateWhen Lanthanum Carbonate (such as Lanfos) is taken at the same time as Levothyroxine, your body absorbs about 40% less of the Levothyroxine. That means the thyroid medicine may not work as well as it should.
These medicines are often taken together with some care. Your doctor may change a dose, space them apart or check on you more often. Make sure your doctor and pharmacist know you take both.