Question 1

What are the main types of thyroid disorders?

Accepted Answer

The most common thyroid disorders are hypothyroidism (an underactive thyroid that produces too little thyroid hormone, leading to fatigue, weight gain, cold intolerance, and depression) and hyperthyroidism (an overactive thyroid producing excess hormone, causing weight loss, palpitations, heat intolerance, and anxiety). Hashimoto's thyroiditis is the leading cause of hypothyroidism in developed countries, while Graves' disease is the most common cause of hyperthyroidism; thyroid nodules and thyroid cancer are separate, less common conditions.

Question 2

How is hypothyroidism treated?

Accepted Answer

The standard treatment for hypothyroidism is daily oral levothyroxine (synthetic T4), which replaces the hormone the thyroid fails to produce adequately; the dose is individualized based on TSH levels, weight, age, and cardiovascular status, and is typically adjusted every 6–8 weeks until TSH normalizes. Most patients take levothyroxine for life, and the American Thyroid Association (ATA) recommends taking it on an empty stomach 30–60 minutes before breakfast to maximize absorption; consult your healthcare provider before changing brands, as bioequivalence differences exist between formulations.

Question 3

What medications treat hyperthyroidism?

Accepted Answer

Antithyroid drugs — methimazole (preferred) and propylthiouracil (used in pregnancy first trimester) — block thyroid hormone synthesis and are effective initial therapy; beta-blockers (e.g., propranolol, atenolol) provide rapid symptom relief for palpitations and tremor while awaiting thyroid hormone normalization. Definitive treatment options include radioactive iodine ablation (RAI) or thyroidectomy (surgical removal), which often result in permanent hypothyroidism requiring levothyroxine — consult an endocrinologist to weigh the options based on your Graves' disease severity, goiter size, and personal preferences.

Question 4

How often should thyroid function be tested?

Accepted Answer

The American Thyroid Association recommends TSH testing every 1–2 years for adults over 60 and for those with known risk factors such as prior thyroid surgery, autoimmune disease, family history, or radiation exposure. For patients on stable thyroid hormone replacement, annual TSH monitoring is generally sufficient once the dose is optimized; consult your healthcare provider if you develop new symptoms between tests, as dose needs can change with weight fluctuations, pregnancy, or medication changes.

Thyroid Disorders

Overview

Drug classes used to treat thyroid disorders

Medications for thyroid disorders

Frequently asked questions