SAN JUAN -- Two of the most commonly used drugs for treating hyperthyroidism were linked to birth defects when used in early pregnancy, though they have differing effects, researchers reported here.

Researchers and doctors at Uppsala University, along with Swedish and international collaboration partners, have found gene variants that predict the risk of a serious adverse reaction to drugs used ...

Methimazole and PTU cross the placenta, and if given in excessive doses (based on maternal thyroid hormone levels) may produce fetal goiter and hypothyroidism. Iodine therapy for hyperthyroidism (eg, ...