Merck Manual

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Drugs Used to Treat Hyperthyroidism

Drugs Used to Treat Hyperthyroidism

Drug

Some Side Effects

Comments

Thionamides

Carbimazole

Methimazole

Propylthiouracil

Allergic reactions (usually rashes)

Nausea

Peculiar taste

Infection (rare) due to a low white blood cell count

Liver dysfunction

Joint aching

Decrease the production of thyroid hormones

Nonmetallic element

Iodine

Rash

Decreases the production and release of thyroid hormones

Radioactive isotope

Radioactive iodine

Hypothyroidism

Destroys the thyroid gland

Beta-blockers

Atenolol

Metoprolol

Propranolol

In people with lung disease, may cause wheezing

Can worsen symptoms of peripheral vascular disease

Can cause depression

May reduce blood pressure (hypotension)

Block many of the stimulating effects of excess thyroid hormones on the heart