Generic Name: liothyronine, Oral tablet

Cytomel

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  • Cytomel
SECTION 1 of 4

Highlights for liothyronine

Oral tablet
1
LIOTHYRONINE (lye oh THYE roe neen) is a thyroid hormone. This medicine can improve symptoms of thyroid deficiency such as slow speech, lack of energy, weight gain, hair loss, dry skin, and feeling cold. It also helps to treat goiter (an enlarged thyroid gland).
2
This drug also comes in other forms, including Parenteral Solution
3 4 5
Talk to your healthcare provider if you have any of these conditions.
6
Know what to watch for and get tips for reducing your risks while taking this drug.
SECTION 2 of 4

liothyronine Side Effects

Oral tablet

Side effects that you should report to your doctor or health care professional as soon as possible:

  • difficulty breathing, wheezing, or shortness of breath
  • chest pain
  • excessive sweating or intolerance to heat
  • fast or irregular heartbeat
  • nervousness
  • skin rash or hives
  • swelling of ankles, feet, or legs
  • tremors

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

  • changes in appetite
  • changes in menstrual periods
  • diarrhea
  • hair loss
  • headache
  • nausea, vomiting
  • tiredness
  • trouble sleeping
  • weight loss
SECTION 3 of 4

liothyronine May Interact with Other Medications

Oral tablet
  • amiodarone
  • antacids
  • anti-thyroid medicines
  • calcium supplements
  • carbamazepine
  • cholestyramine
  • colestipol
  • digoxin
  • female hormones, including contraceptive or birth control pills
  • iron supplements
  • ketamine
  • liquid nutrition products like Ensure
  • medicines for colds and breathing difficulties
  • medicines for diabetes
  • medicines for mental depression
  • medicines or herbals used to decrease weight or appetite
  • phenobarbital or other barbiturate medications
  • phenytoin
  • prednisone or other corticosteroids
  • rifabutin
  • rifampin
  • soy isoflavones
  • sucralfate
  • theophylline
  • warfarin
SECTION 4 of 4

How to Use liothyronine

Oral tablet

Take this medicine by mouth with plenty of water. It is best to take on an empty stomach, at least 30 minutes before or 2 hours after food. Follow the directions on the prescription label. Take at the same time each day. Do not take your medicine more often than directed.

Contact your pediatrician regarding the use of this medicine in children. While this drug may be prescribed for children and infants as young as a few days of age for selected conditions, precautions do apply.

What should I tell my health care provider before I take this medicine?

They need to know if you have any of these conditions:

  • angina
  • diabetes
  • dieting or on a weight loss program
  • fertility problems
  • heart disease
  • high levels of thyroid hormone
  • pituitary gland problem
  • previous heart attack
  • an unusual or allergic reaction to liothyronine, thyroid hormones, other medicines, foods, dyes, or preservatives
  • pregnant or trying to get pregnant
  • breast-feeding
What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

What should I watch for while using this medicine?

You will need regular exams and occasional blood tests to check the response to treatment. If you receive this medicine for an underactive thyroid, it may be several weeks before you notice an improvement. Check with your doctor or health care professional if your symptoms do not improve.

It may be necessary for you to take this medicine for the rest of your life. Do not stop using this medicine unless your doctor or health care professional advises you to.

This medicine can affect blood sugar levels. If you have diabetes, check your blood sugar as directed.

If you are going to have surgery, tell your doctor or health care professional that you are taking this medicine.

Where should I keep my medicine?

Keep out of the reach of children.

Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Protect from light and moisture. Keep container tightly closed. Throw away any unused medicine after the expiration date.

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Last Updated: June 23, 2009

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