Liothyronine Side Effects

Possible side effects of liothyronine are listed below. Tell your doctor if these side effects are severe or do not go away in a few days.

• Weight loss
• Excessive sweating
• Heat sensitivity
• Nervousness or anxiety
• Weakness
• Fatigue
• Temporary hair loss in the first few months of treatment (especially in children)

Less commonly, liothyronine can cause more serious side effects. Call your doctor immediately or seek emergency medical attention if you develop:

• Chest pain
• Fast or irregular heartbeat

The above list may not include all the possible side effects of liothyronine. Call your doctor for medical advice about side effects if they are unusual or severe, or if they do not get better over time. You can also report unusual side effects to the Food and Drug Administration at 1-800-FDA-1088.

Liothyronine Overdose: In case of an overdose, contact your doctor immediately. You can also call the National Poison Control Center at 1-800-222-1222. If a person cannot be awakened, has trouble breathing, has collapsed, or has had a seizure, call 911. Overdose symptoms may include sweating, headache, irritability, nervousness, increased bowel movements, and irregular menses.

Source: FDA