Unithroid

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Unithroid

Generic name: Levothyroxine
Brand names: Unithroid, Levoxyl, Synthroid, Levothroid

Why is Unithroid prescribed?

Unithroid, a synthetic thyroid hormone may be given in any of the following cases:

If your own thyroid gland is not making enough hormone;

If you have an enlarged thyroid (a goiter) or are at risk for developing a goiter;

If you have certain cancers of the thyroid;

If your thyroid production is low due to surgery, radiation, certain drugs, or disease of the pituitary gland or hypothalamus in the brain.

Most important fact about Unithroid

If you are taking Unithroid to make up for a lack of natural hormone, it is important to take it regularly at the same time every day. You will probably need to take it for the rest of your life.

How should you take Unithroid?

Take Unithroid as a single dose, preferably on an empty stomach, one-half to one hour before breakfast. The drug is absorbed better on an empty stomach.

If an infant or child cannot swallow whole tablets, you may crush a Unithroid tablet and mix it into 1 or 2 teaspoonfuls of water.

While taking Unithroid, your doctor will perform periodic blood tests to determine whether you are getting the right amount.

--If you miss a dose...

Take it as soon as you remember. If it is almost time for your next dose, skip the one you missed and go back to your regular schedule. Never take 2 doses at the same time. If you miss 2 or more doses in a row, consult your doctor.

--Storage instructions...

Keep Unithroid in a tightly closed container. Store it at room temperature, away from light and moisture.

What side effects may occur?

Side effects from Unithroid, other than overdose symptoms, are rare. People who are treated with Unithroid may initially lose some hair, but this effect is usually temporary. You may have an allergic reaction such as a rash or hives. Children may have an increase in pressure within the skull. Excessive dosage or a too rapid increase in dosage may lead to overstimulation of the thyroid gland. Notify your doctor immediately if you develop any if the following symptoms.

  • Symptoms of overstimulation:
    Abdominal cramps, anxiety, changes in appetite, change in menstrual periods, chest pain, diarrhea, emotional instability, fatigue, fever, flushing, hair loss, headache, heart attack or failure, heat intolerance, hyperactivity, increased heart rate, irregular heartbeat, irritability, muscle weakness, nausea, nervousness, palpitations, shortness of breath, sleeplessness, sweating, tremors, vomiting, weight loss

Why should Unithroid not be prescribed?

You should not be treated with Unithroid if you are hypersensitive to thyroid hormone; your thyroid gland is making too much thyroid hormone; you have had a recent heart attack; or your adrenal glands are not making enough corticosteroid hormone. If you are sensitive to dyes, you can take the Unithroid 50-microgram tablet, which is made without color additives.

Although Unithroid will speed up your metabolism, it is not effective as a weight-loss drug and should not be used as such. An overdose may cause life-threatening side effects, especially if you take Unithroid with an appetite-suppressant medication.

Special warnings about Unithroid

Unithroid has profound effects on the body. Make sure your doctor is aware of all your medical problems, especially heart disease, clotting disorders, diabetes, and disorders of the adrenal or pituitary glands. The doctor will also need to know about any allergies you may have to food or medicine, and will ask for the names of any medications you take, whether prescription or over-the-counter.

You should receive low doses of Unithroid, under very close supervision, if you are an older person, or if you suffer from high blood pressure, angina (chest pain caused by a heart condition), or other types of heart disease. If you develop chest pain or additional circulatory problems, your dosage may have to be reduced.

If you have diabetes, or if your body makes insufficient adrenal corticosteroid hormone, Unithroid will tend to make your symptoms worse. If you take medication for any of these disorders, the dosage will probably have to be adjusted once you begin taking Unithroid. If diabetes is the problem, you should immediately report to your doctor any change in your glucose readings.

Postmenopausal women on long-term Unithroid therapy may suffer a loss of bone density, increasing the danger of osteoporosis (brittle bones). To minimize the loss, the doctor will prescribe the lowest dosage needed to control symptoms of thyroid deficiency.

Unithroid may cause seizures at the beginning of treatment, although this is rare. You may also notice some hair loss at first, but this is temporary.

It may take a few weeks for Unithroid to begin working, and you may not see any change in your symptoms until then.

Tell your doctor or dentist you are taking Unithroid before you have surgery of any kind.

Tell your doctor if you become pregnant while you are taking Unithroid. Your dose may need to be increased.

Do not switch to another brand of levothyroxine without consulting your doctor.

Excessive doses of Unithroid in infants may cause the top of the skull to close too early. In children, overtreatment can stunt growth.

Possible food and drug interactions when taking Unithroid

Unithroid can interact with a wide variety of medications. It"s advisable to check with your doctor before taking any other drug, but you should be especially wary of the following:

Amiodarone (Cordarone)
Androgens (male hormones)
Antacids and anti-gas medications
Antidepressants such as Elavil, Ludiomil, and Zoloft
Blood pressure drugs such as beta blockers, nitroprusside, and thiazide diuretics
Blood-thinning drugs such as Coumadin and heparin
Chloral hydrate (a sedative)
Diabetes drugs such as insulin and Micronase
Digitalis-type drugs such as Lanoxin
Estrogen products and oral contraceptives
Furosemide (Lasix)
Growth hormones
Hormone inhibitors such as Cytadren and Tapazole
Iodide
Iron supplements
Kayexalate
Ketamine (Ketalar)
Lithium (Eskalith, Lithobid)
Methadone and heroin
Metoclopramide (Reglan)
Nonsteroidal anti-inflammatory drugs such as phenylbutazone and aspirin
Parkinson"s drugs such as Sinemet
Propylthiouracil (a thyroid inhibitor)
Seizure medications such as Dilantin, Tegretol, and phenobarbital
Steroids such as dexamethasone and hydrocortisone
Stimulants such as epinephrine (EpiPen)
Sucralfate (Carafate)
The cancer drugs 5-fluorouracil, 6-mercaptopurine, mitotane, and tamoxifen
The cholesterol-lowering drugs Colestid, Mevacor, and Questran
The immune-system drugs interferon and interleukin
The tranquilizers Trilafon and Valium
The tuberculosis drugs aminosalicylate, rifampin, and ethionamide
Theophylline (Theo-Dur)

A high-fiber diet, soy-containing supplements, and walnuts can also interfere with Unithroid effects.

Special information if you are pregnant or breastfeeding

If you need to take Unithroid because of a thyroid hormone deficiency, you can continue to take the medication during pregnancy. In fact, your doctor will test you regularly and may increase your dose. Once your baby is born, you may breastfeed while continuing to take carefully regulated doses of Unithroid.

Recommended dosage

Your doctor will tailor the dosage to meet your individual requirements, taking into consideration the status of your thyroid gland and other medical conditions you may have. Older adults often require somewhat smaller doses. To make sure the dosage is right for you, the doctor will monitor your thyroid hormone level with periodic blood tests.

Overdosage

An overdose of Unithroid can produce the same symptoms of overstimulation listed under "What side effects may occur?" Confusion and disorientation are also possible, and there have been reports of stroke, shock, coma, and death. If you suspect a massive overdose, seek emergency medical attention immediately.





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