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In this Article

• What is liothyronine (Cytomel)?
• What are the possible side effects of liothyronine (Cytomel)?
• What is the most important information I should know about liothyronine (Cytomel)?
• What should I discuss with my healthcare provider before taking liothyronine (Cytomel)?
• How should I take liothyronine (Cytomel)?
• What happens if I miss a dose (Cytomel)?
• What happens if I overdose (Cytomel)?
• What should I avoid while taking liothyronine (Cytomel)?
• What other drugs will affect liothyronine (Cytomel)?
• Where can I get more information?

What happens if I miss a dose (Cytomel)?

Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and take the medicine at the next regularly scheduled time. Do not take extra medicine to make up the missed dose.

What happens if I overdose (Cytomel)?

Seek emergency medical attention if you think you have used too much of this medicine.

Overdose symptoms may include headache, sweating, diarrhea, irregular menstrual periods, feeling restless or irritable, confusion, weakness, swelling in your hands or feet, fast heart rate, chest pain, feeling short of breath, or fainting.

What should I avoid while taking liothyronine (Cytomel)?

If you also take cholestyramine (Prevalite, Questran) or colestipol (Colestid), avoid taking these medications within 4 hours before or after you take liothyronine.

What other drugs will affect liothyronine (Cytomel)?

The following drugs can interact with liothyronine. Tell your doctor if you are using any of these:

• birth control pills or hormone replacement therapy;
• a blood thinner such as warfarin (Coumadin);
• digoxin (digitalis, Lanoxin);
• insulin or diabetes medication you take by mouth;
• medications that contain iodine (such as I-131);
• an antidepressant such as amitriptyline (Elavil, Etrafon), doxepin (Sinequan), desipramine (Norpramin), imipramine (Janimine, Tofranil), nortriptyline (Pamelor), and others;
• salicylates such as aspirin, Backache Relief Extra Strength, Novasal, Nuprin Backache Caplet, Doan's Pills Extra Strength, Tricosal, and others; or
• steroids such as prednisone and others.

This list is not complete and there may be other drugs that can interact with liothyronine. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.

Where can I get more information?

Your pharmacist can provide more information about liothyronine.

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

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