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4RX Store > Medication List > Thyroid drugs > Order Levothyroxine online

Thyroid Medication (Levothyroxine)

Generic name:
Brand name:
The medication sold under the trademark Eltroxin among others is based on Levothyroxine, a synthetic thyroid hormone. It is prescribed in many conditions in which insufficient amount of the hormone is produced such as benign thyroid diseases, prophylaxis of relapse after surgical therapy of euthyroid goiter, as a replacement therapy for underactive thyroid, suppressive therapy for thyroid cancer, as an adjunct to antithyroid therapy for hyperthyroidism, for the test of thyroid suppression. Find out how and when to use the drug from the guide below.
Therapy of benign thyroid diseases, Prophylaxis of relapse after surgical therapy of euthyroid goiter, Replacement therapy for underactive thyroid, Suppressive therapy for thyroid cancer, Adjunct to antithyroid therapy for hyperthyroidism, Test of thyroid suppression
The medication renders the effect identical to the thyroid hormones in their deficiency normalizing body functioning
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Levothyroxine, Euthyrox, Laevoxin, Levaxin, Levolet, Levothroid, Levoxine, Levoxyl, Novothyrox, Oroxine, Thyratabs, Thyrax, Thyroxin, Unithroid, Synthroid
Levothyroxine (Generic Eltroxin)
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  100 tabs
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  Generic Medication guide:

What is Eltroxin and when is it used?

The medication known as Eltroxin among others is based on the substance called Levothyroxine. It is a sodium salt of L-thyroxine, after partial metabolism, is able to replace thyroid hormones which are in deficiency for different reasons.

To buy Eltroxin at a lower price than usual, look for a generic medication which you can find on this webpage. It is the same product simply made and marketed by another pharmaceutical company.

Short drug info
Trade names Levothyroxine, Euthyrox, Laevoxin, Levaxin, Levolet, Thyrax, Thyroxin, Unithroid, Synthroid, others
Routes of administration by mouth, intravenous
Pregnancy category US: A (No risk in human studies)
Legal status US: Rx-only
Bioavailability 40-80%
Metabolism mainly in liver, kidneys, brain and muscles
Elimination half-life ca. 7 days (in hyperthyroidism 3–4 days, in hypothyroidism 9–10 days)
Excretion feces and urine

Levothyroxine is a synthetic isomer of thyroxin. It exhibits effects identical to those which the hormone made by the thyroid gland provides. It is transformed into T3 (triiodothyronine) in the organs and affects T3 receptors. There is no difference between the functions of natural and synthetic hormones effects.

The formulation absorbed in the upper the small intestine. The highest plasma level is achieved after about 5-6 hours.

The effect of the Eltroxin appears after three to five days of use.

The elimination half-life makes seven days. With thyrotoxicosis, this time is three to four days, and with underactive lengthens up to up to ten days.

Indications for Eltroxin use

- Benign thyroid diseases.

- Prevention of relapse after surgery for goiter.

- Thyroid cancer (part of the complex therapy).

- Antithyroid therapy for an overactive thyroid.

- Test of thyroid function.

When is Eltroxin use prohibited?

Even in case of the diagnosis for which the medication is used, make sure to inform your health provider if:

- You have hypersensitivity to the components of the medication (i.e. allergy, severe adverse reactions after the use).

- You suffer from untreated adrenal or pituitary insufficiency, or thyrotoxicosis.

- You have had a recent severe heart event or pancreatitis.

- You are undergoing complex therapy with thyreostatics during gestation.

In event of any of the above conditions, do not buy generic Eltroxin without talking to your healthcare provider first.

During gestation and breastfeeding, the therapy prescribed for the diminished function of thyroid should be continued. There may be even the need to raise the dosage of the medication.

The combined therapy of Eltroxin and antithyroid drugs when expecting a baby should be prescribed for the therapy of overactive thyroid since this combination of drugs requires the use of higher dosages of antithyroid medicines, which can pass through the placenta and can cause the development of underactive thyroid in newborns.

The formulation passes into milk, but when used in usual therapeutic doses, the concentration is insufficient for the onset of overactive thyroid or inhibition of TSH synthesis in the baby.

How is Eltroxin used?

Even though you can buy Levothyroxine without Rx at our drugstore, you should know that the dosages and length of the course are set by a medical professional based on the patient’s tests. Thus, you should follow your healthcare provider recommendations. Here you can find the general guidelines for the therapy with Eltroxin.

The therapy should begin with a minimum dosage and slowly raised, (every half of a month or a month) to the sufficient therapeutic dosage.

Dosages of Eltroxin for different conditions


Recommended dosages

(Levothyroxine sodium, mcg per day)

Treatment of benign thyroid diseases 75-200
Relapse prevention after surgical treatment of euthyroid goiter 75-200
In the treatment of hypothyroidism in adults - initial dose; - maintenance dose 25-50 100-200
In the treatment of hypothyroidism in children - initial dose; - maintenance dose 12,5-50 100-150 mcg/sq.m of the body surface
As an adjunct to antithyroid therapy for hyperthyroidism. 50-100
Thyroid Cancer Suppressive Therapy 150-300
As a diagnostic tool for the thyroid suppression test

In 4 weeks to the test - 75 mcg a day

In 3 weeks to the test - 75 mcg a day

In 2 weeks to the test - 150 mcg- 200mcg a day

In 1 week to the test - 150 mcg- 200mcg a day

Senior individuals with heart or vessels diseases and with a severe, long-lasting underactive thyroid should begin therapy with extreme caution, from small doses (12.5 mg per day), raise the dose to supportive one at sufficient intervals (12.5 mg every half of a month), and do regular tests. It must be taken into account that the administration of doses lower than the optimal one, which ensures replacement therapy does not provide to sufficient regulation of TSH level.

When and for how long is Eltroxin taken?

The dosage is taken 30 minutes prior to breakfast.

For infants, give the daily dose in 1 administration 30 minutes prior to the first feeding. Dissolve the tablet in water until a thin suspension is obtained, which should be prepared immediately before the medication administration.

When you buy generic Levothyroxine to replace the natural hormones after surgical interventions (thyroidectomy), or to prevent recurrence after removal of goiter, it must be taken throughout life.

In a mild form of goiter, the course is from half of a year to two years. If the tests do not show improvement, surgery or radioactive therapy should be prescribed.

Overdose of Eltroxin

An increase in T3 is a reliable indication of a chronic overdose. Sometimes, individuals who are prone to seizures may develop seizures when the individual permissible dosage of the medication has been exceeded. As a result of an overdose, metabolic rates may increase. In an overdose, stop using the medication and do tests.

With symptoms such as rapid heartbeat, anxiety, nervous irritability, hyperkinesias, beta-blockers are prescribed. With a significant excess of the dose, plasmapheresis is recommended.

There are several cases of death due to impaired heart function in individuals who have abused the medication for long periods of time.

What adverse reactions can generic Eltroxin cause?

Clinical symptoms of an overactive thyroid can occur with an overdose, in cases of individual high susceptibility to Levothyroxine if the dose is rapidly raised.

- From the cardiovascular system: irregular heart rate, rapid heartbeat, chest pain, palpitations, hot flashes. - Nervous system: headache, trouble falling asleep, anxiety, tremor.

- Digestive tract: vomiting, lose stool, body mass decrease.

- Skin and muscles: enhanced sweating, muscle weakness, and spasms. - General disorders: fever, menstrual disorders. The dosage should be lowered or the therapy discontinued for several days. After the fading of symptoms, therapy can be continued.

In enhanced sensitivity, allergy can occur including skin rashes, itching, hives, and dyspnea. Quincke's edema can rarely develop.

Can Eltroxin be taken with other medicines?

If you take any medicines when your healthcare provider prescribes you Eltroxin, make sure to check their compatibility: - Antidiabetic drugs: Levothyroxine may lower the effect of antidiabetic medicines.

- Coumarin derivatives: Levothyroxine enhances the effect of anticoagulants and thus bleeding, particularly in the elderly. Thus, it is required to do laboratory control of coagulation indicators and, if needed, lower the dose of blood thinners.

- HIV medications may have an impact on the effect of the medication. Thyroid hormone levels must be controlled and dosages adjusted.

- Phenytoin can affect the effect of Levothyroxine.

- Cholestyramine, colestipol slow down the absorption of Levothyroxine.

- Antacids, Sucralfate, iron and calcium medications can negatively affect the thyroid medication. Therefore, Levothyroxine must be taken at least two hours before the mentioned medicines.

- Sertraline, chloroquine/proguanil diminish the effectiveness of the drug. - Medicines that induce liver enzymes can enhance the liver clearance of Eltroxin.

- Estrogens. Women who take birth control with estrogens and postmenopausal women who use hormone replacement medications may need higher doses of the thyroid medication.

Note: for the full list of interactions read the package insert.

Special recommendations for Eltroxin use

- Before you order Eltroxin, the presence or preliminary treatment of diseases such as coronary heart disease and other severe heart conditions or adrenal insufficiency should be excluded.

- If a toxic adenoma is suspected, TSH levels should be determined or thyroid scintigraphy should be performed prior to treatment with the formulation.

- For women in the postmenopausal period, suffering from hypothyroidism, at an increased risk of developing osteoporosis, too high a level of Levothyroxine in blood serum should be avoided, exceeding the physiological level. Thus, it is required to carefully monitor laboratory indicators of thyroid function.

- It is not prescribed to individuals with a hyperthyroid state when antithyroid drugs are being used to treat hyperthyroidism.

- Thyroid hormones do not contribute to weight loss in individuals with a thyroid gland that is functioning normally.

- If the appointed doses are exceeded, negative reactions may develop (see the section “Overdose”).

- After starting to take Levothyroxine or changing the medication, it is advised to adjust the dosage based on an individual’s response and tests.

- Individuals with rare hereditary intolerance to galactose, fructose, lactase deficiency or malabsorption of glucose-galactose or sucrose-isomaltose deficiency should not use this drug.

- Use with caution in diabetes.

You can order generic Eltroxin for months ahead from our online pharmacy to save not only on the difference in the price of the branded drug and generic but also on the delivery. All orders exceeding $170 are shipped for free.

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Product Reviews:

Nov / 27 / 2017 robert hardick   USA, Prattville
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