Generic name: Liotrix [ LYE-oh-triks ]
Drug class: Thyroid drugs
Medically reviewed by Drugs.com. Last updated on Feb 21, 2023.
- Do not use Thyrolar (liotrix) to treat obesity or for weight loss. Very bad and sometimes deadly side effects may happen with Thyrolar (liotrix) if it is taken in large doses or with other drugs for weight loss. Talk with the doctor.
Uses of Thyrolar:
- It is used to add thyroid hormone to the body.
- It is used to treat or prevent an enlarged thyroid gland.
- It is used to manage thyroid cancer.
- It may be given to you for other reasons. Talk with the doctor.
What do I need to tell my doctor BEFORE I take Thyrolar?
- If you have an allergy to liotrix or any other part of Thyrolar (liotrix).
- If you are allergic to Thyrolar (liotrix); any part of Thyrolar (liotrix); or any other drugs, foods, or substances. Tell your doctor about the allergy and what signs you had.
- If you have any of these health problems: Overactive thyroid gland or weak adrenal gland.
This is not a list of all drugs or health problems that interact with Thyrolar (liotrix).
Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take Thyrolar (liotrix) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.
What are some things I need to know or do while I take Thyrolar?
- Tell all of your health care providers that you take Thyrolar (liotrix). This includes your doctors, nurses, pharmacists, and dentists.
- Do not run out of Thyrolar (liotrix).
- If you have high blood sugar (diabetes), you will need to watch your blood sugar closely.
- Have blood work checked as you have been told by the doctor. Talk with the doctor.
- If you are 65 or older, use Thyrolar (liotrix) with care. You could have more side effects.
- Use with care in children. Talk with the doctor.
- Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using Thyrolar (liotrix) while you are pregnant.
- Tell your doctor if you are breast-feeding. You will need to talk about any risks to your baby.
How is this medicine (Thyrolar) best taken?
Use Thyrolar (liotrix) as ordered by your doctor. Read all information given to you. Follow all instructions closely.
- Take on an empty stomach before breakfast.
- Do not take colesevelam, colestipol, or cholestyramine within 4 hours of Thyrolar (liotrix).
- It may take several weeks to see the full effects.
- Keep taking Thyrolar (liotrix) as you have been told by your doctor or other health care provider, even if you feel well.
What do I do if I miss a dose?
- Take a missed dose as soon as you think about it.
- If it is close to the time for your next dose, skip the missed dose and go back to your normal time.
- Do not take 2 doses at the same time or extra doses.
What are some side effects that I need to call my doctor about right away?
WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:
- Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
- Chest pain or pressure or a fast heartbeat.
- A heartbeat that does not feel normal.
- Shortness of breath, a big weight gain, or swelling in the arms or legs.
- Lump on your neck.
- Feeling irritable.
- Feeling nervous and excitable.
- Not able to sleep.
- Bothered by heat.
- Sweating a lot.
- Leg cramps.
- Muscle weakness.
- Feeling more or less hungry.
- A change in weight without trying.
- Stomach cramps.
- Throwing up.
- Period (menstrual) changes.
What are some other side effects of Thyrolar?
All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:
- Hair loss may happen in some people in the first few months of using Thyrolar (liotrix). This most often goes back to normal.
These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.
You may report side effects to the FDA at 1-800-332-1088. You may also report side effects at https://www.fda.gov/medwatch.
If OVERDOSE is suspected:
If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.
How do I store and/or throw out Thyrolar?
- Store in a refrigerator. Do not freeze.
- Protect from light.
- Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
- Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.
Consumer Information Use and Disclaimer
- If your symptoms or health problems do not get better or if they become worse, call your doctor.
- Do not share your drugs with others and do not take anyone else's drugs.
- Some drugs may have another patient information leaflet. Check with your pharmacist. If you have any questions about Thyrolar (liotrix), please talk with your doctor, nurse, pharmacist, or other health care provider.
- If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.
More about Thyrolar (liotrix)
- Check interactions
- Compare alternatives
- Side effects
- Dosage information
- During pregnancy
- Drug class: thyroid drugs
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Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.