The nurse is working with a client who is newly diagnosed with hypothyroidism. Diagnostic testing has indicated that the client’s health problem is caused by anterior pituitary dysfunction.
This client’s hypothyroidism is rooted in a deficiency of:

This is an antithyroid medication that can be used safely during pregnancy, as it has a lower risk of causing birth defects or fetal hypothyroidism than other drugs. Propylthiouracil inhibits the synthesis of thyroid hormones and also blocks their conversion to the more active form.

Choice A is wrong because radioactive iodine is contraindicated during pregnancy, as it can cross the placenta and damage the fetal thyroid gland.

Radioactive iodine is used to destroy overactive thyroid cells and treat hyperthyroidism.

Choice B is wrong because alendronate is not an antithyroid medication, but a bisphosphonate that is used to treat osteoporosis and prevent bone loss.

Alendronate should not be used during pregnancy, as it may affect fetal bone development and mineralization.

Choice D is wrong because methimazole is another antithyroid medication, but it is not the drug of choice for pregnant women, as it has a higher risk of causing birth defects or fetal hypothyroidism than propylthiouracil.

Methimazole also inhibits the synthesis of thyroid hormones, but does not block their conversion to the more active form.

Choice A.Isoetharine is a bronchodilator that works by relaxing muscles in the airways to improve breathing. It is not a mast cell stabilizer.

Choice B is wrong because aminophylline is a bronchodilator that relaxes the muscles in the airways and is used in the treatment of asthma and chronic obstructive pulmonary disease (COPD). It is not a mast cell stabilizer.

Choice C is wrong becauseIpratropium is an anticholinergic bronchodilator that helps to open up the airways in the lungs. It is used in the treatment of COPD and sometimes asthma, but it is not a mast cell stabilizer.

Choice D. Cromolyn is a mast cell stabilizer that helps prevent the release of substances in the body that cause inflammation and asthma symptoms. It is used for the prevention of asthma attacks and is particularly effective in managing exercise-induced asthma and allergic asthma triggers.