Levoxine Ingredients: Levothyroxine
Generic Available ? A generic alternative may be available.
Ask your doctor or pharmacist for more information.
Who is Levoxine for ?
Levothyroxine, a thyroid hormone, is used to
treat hypothyroidism, a condition where the thyroid gland does not
produce enough thyroid hormone. Without this hormone, the body
cannot function properly, resulting in poor growth, slow speech,
lack of energy, weight gain, hair loss, dry thick skin, and
increased sensitivity to cold. When taken correctly, levothyroxine
reverses these symptoms. Levothyroxine also is used to treat
congenital hypothyroidism (cretinism) and goiter (enlarged thyroid
gland). this medication is sometimes prescribed for other uses; ask
your doctor or pharmacist for more information.
How does it work ?
The exact mechanism of action is not known,
but it is thought that levothyroxine, a thyroid hormone, restores
thyroid hormone that your body may be lacking.
When should I be careful taking Levoxine ?
Thyroid hormone should not be used to treat
obesity in patients with normal thyroid function. Levothyroxine is
ineffective for weight reduction in normal thyroid patients and may
cause serious or life-threatening toxicity, especially when taken
with amphetamines. Talk to your doctor about the potential risks
associated with this medication.
Before taking levothyroxine,
- tell your doctor and pharmacist if you are
allergic to levothyroxine, thyroid hormone, any other drugs,
povidone iodine, tartrazine (a yellow dye in some processed foods
and drugs), or foods such as lactose or corn starch. Levothroid
and Eltroxin contain lactose, while Synthroid contains tartrazine
and povidone. Eltroxin contains corn starch.
- tell your doctor and pharmacist what
prescription and nonprescription medications you are taking,
especially amphetamines; anti-acids; anticoagulants ("blood
thinners") such as warfarin (Coumadin); antidepressants or anti-anxiety
agents; arthritis medicine; aspirin; beta-blockers such as
metoprolol (Lopressor, Toprol), propranolol (Inderal) or timolol (Blocadren,
Timoptic); cancer chemotherapy agents; cholesterol-lowering resins
such as cholestyramine (Questran) or colestipol (Colestid);
diabetes medications (insulin and tablets); digoxin (Lanoxin);
estrogens; iron; methadone; oral contraceptives; phenytoin (Dilantin);
sodium polystrene sulfonate (Kayexalate); sucralfate (Carafate);
steroids; theophylline (TheoDur); and vitamins.
- if you take cholestyramine (Questran) or
colestipol (Colestid), take it at least 4 hours before or 1 hour
after taking levothyroxine.
- tell your doctor if you have or have ever
had diabetes; hardening of the arteries (atherosclerosis); kidney
disease; hepatitis; cardiovascular disease such as high blood
pressure, chest pain (angina), arrhythmias, or heart attack; or an
underactive adrenal or pituitary gland.
- tell your doctor if you are pregnant, plan
to become pregnant or are breast-feeding. If you become pregnant
while taking levothyroxine, call your doctor.
- if you have surgery, including dental
surgery, tell the doctor or dentist that you are taking
Although side effects from levothyroxine are
not common, they can occur. Tell your doctor if any of these
symptoms are severe or do not go away:
- weight loss
- upset stomach
- stomach cramps
- excessive sweating
- increased appetite
- changes in menstrual cycle
- sensitivity to heat
- temporary hair loss, particularly in
children during the first month of therapy
If you experience either of the following
symptoms, call your doctor immediately:
- chest pain (angina)
- rapid or irregular heartbeat or pulse