Brand name:
THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid)
Generic name: Levothyroxine
Other brand names: Levothroid, Levoxyl, Unithroid
Why is THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx prescribed?
THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx, 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 THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx
If you are taking THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx 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 THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx?
Take THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx 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
THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx tablet and mix it into 1 or 2 teaspoonfuls of water.
While taking THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx, your doctor will perform periodic blood tests
to determine whether you are getting the right amount.
If you miss a dose ELTROXIN (Levothyroxine, Levothroid, Levoxine, Levoxyl,
Synthroid, Unithroid)
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 THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx in a tightly closed container. Store it at room temperature,
away from light and moisture.
THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx side effects
Side effects from THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx, other than overdose symptoms, are rare.
People who are treated with THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx 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 THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx not be prescribed?
You should not be treated with THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx 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 THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx 50-microgram tablet, which is made without color additives.
Although THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx 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 THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx
with an appetite-suppressant medication.
Special warnings about THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx
THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx 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 THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx, 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, THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx 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 THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx. If diabetes is the problem,
you should immediately report to your doctor any change in your glucose
readings.
Postmenopausal women on long-term THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx 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.
THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx 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 THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx to begin working, and you may
not see any change in your symptoms until then.
Tell your doctor or dentist you are taking THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx before you have
surgery of any kind.
Tell your doctor if you become pregnant while you are taking THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx.
Your dose may need to be increased.
Do not switch to another brand of levothyroxine without consulting your
doctor.
Excessive doses of THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx 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 THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx
THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx 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 THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx effects.
Special information if you are pregnant or breastfeeding
If you need to take THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx because of a thyroid hormone deficiency,
you can continue to take THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx 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 THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx.
Recommended dosage for THYROX (Levothyroxine, Levothroid, Levoxine, Levoxyl, Synthroid, Unithroid) rx
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
