Do medications for hyperthyroidism affect the heart?

May 16, 2023 Source: Cainiu Health

Dr. Pan Yongyuan

Introduction

Hyperthyroidism refers to hyperthyroid state, and medications used for treating hyperthyroidism. Long-term use of these drugs may directly or indirectly lead to cardiac enlargement or sexual dysfunction in patients, and may even trigger myocardial infarction. If the symptoms of hyperthyroidism are mild and do not require long-term medication, there may be no significant impact on cardiac function.

Generally speaking, hyperthyroidism refers to hyperfunction of the thyroid gland. Medications used for treating hyperthyroidism may affect the heart; however, if taken as prescribed by a doctor, they may have no adverse effects. The detailed analysis is as follows:

1. Effects exist

Hyperthyroidism may result from excessive secretion of thyroid hormones in the body, mainly manifesting as increased appetite, excessive thirst, frequent urination, and weight loss, all of which significantly impact overall health. Treatment typically involves antithyroid medications. Long-term use of these drugs may directly or indirectly lead to cardiac complications such as enlargement of the heart or cardiac insufficiency, and in severe cases, even myocardial infarction.

2. No effects

If symptoms of hyperthyroidism are mild and do not require long-term medication, there may be no significant impact on heart function. Although the drugs themselves may not affect the heart, they can cause side effects such as reduced white blood cell count, liver damage, and skin rashes. Therefore, it is essential to strictly follow medical instructions when taking these medications.

After being diagnosed with hyperthyroidism, it is recommended to seek prompt medical attention at a hospital. Maintain healthy daily routines and dietary habits, avoid staying up late, and consume more fruits and vegetables. If any discomfort or symptoms arise, patients should immediately go to the hospital for treatment.

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Do I need to stop taking hyperthyroidism medication before receiving the 9-valent HPV vaccine?

Patients with hyperthyroidism generally do not need to stop taking their anti-hyperthyroidism medication before receiving the 9-valent human papillomavirus (HPV) vaccine. It is important, however, that thyroid function is adjusted to within the normal range and that the disease is in a stable phase prior to vaccination. Under these conditions, the HPV vaccine's efficacy is typically unaffected, and the 9-valent HPV vaccine does not exert any abnormal effects on hyperthyroidism.

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Can antiallergic medications be taken concurrently if a patient develops an allergic reaction to hyperthyroidism medication?

Antithyroid medications and antiallergic drugs can be taken concurrently. However, if you experience an allergic reaction to the antithyroid medication, you should consult a specialist endocrinologist. For mild allergic reactions, antiallergic medications may be administered followed by close observation. In cases of severe allergic reactions—such as widespread rash or laryngeal edema—the antithyroid medication must be discontinued immediately, and further diagnosis and management should be guided by a physician.

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Can medication for hyperthyroidism be discontinued during treatment?

In the early stages of hyperthyroidism or during treatment, if the patient has not yet reached a stable condition—that is, thyroid hormone levels and thyroid-stimulating hormone levels have not returned to normal—medication generally should not be discontinued. Suddenly stopping the medication at this time may cause the thyroid function to become overactive again, leading to worsening symptoms such as palpitations, sweating, weight loss, and anxiety.