This text is for informational purposes only. Please consult a doctor or pharmacist before using any medication. 

Read the information leaflet that comes with the medication.

As with all medications, Cytomel can lead to potential side effects, though not everyone will necessarily experience them.

The most common adverse reactions associated with Cytomel come from taking too much of the medication, resulting in symptoms similar to hyperthyroidism. These symptoms may include irregular heartbeats, difficulty breathing, headaches, nervousness, irritability, trouble sleeping, tremors, muscle weakness, increased appetite, weight loss, diarrhea, intolerance to heat, menstrual irregularities, and skin rashes. Get emergency help immediately if any of the symptoms of overdose occur.

Not all side effects are listed here. If these or other unlisted symptoms persist or worsen, consult a healthcare provider or pharmacist.

Hypothyroidism: Cytomel may be prescribed for an underactive thyroid, whether it’s from birth or acquired, and in cases where the thyroid, pituitary, or hypothalamus are involved. Symptoms may include feeling tired, gaining weight, constipation, dry skin, losing hair, and feeling cold quickly.

Thyroid cancer: Cytomel is also prescribed after surgery, along with radioiodine therapy, for managing some types of thyroid cancer. Symptoms of thyroid cancer can include a lump or swelling in the neck, difficulty swallowing, and voice changes.