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Euthyrox
Euthyrox (generic name: levothyroxine sodium) is a synthetic form of the thyroid hormone used to treat hypothyroidism (an underactive thyroid). It is prescribed to replace or supplement thyroid hormone in patients whose thyroid gland does not produce enough. Levothyroxine helps regulate the body's metabolism and energy levels.
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Frequently Asked Questions
How long does it take for Euthyrox to work?
It may take 4 to 6 weeks for symptoms to improve after starting Euthyrox, but blood tests can confirm effectiveness sooner.
Can I take Euthyrox with food?
No, it is best to take Euthyrox on an empty stomach for optimal absorption.
How often do I need blood tests while taking Euthyrox?
Blood tests are typically done every 6 to 12 weeks after starting treatment or adjusting the dose, then less frequently once stable.
Can Euthyrox cause weight loss?
If you are overmedicated, Euthyrox may cause hyperthyroidism, which can lead to weight loss. Always take it as prescribed.
Is Euthyrox safe for long-term use?
Yes, Euthyrox is safe for long-term use, but regular monitoring is required to ensure the dosage remains effective and safe.
Comprehensive Drug Guide
How Does Euthyrox Work?
Euthyrox works by providing synthetic thyroxine (T4), a hormone normally produced by the thyroid gland. Once absorbed, it is converted into triiodothyronine (T3), the active form of thyroid hormone that regulates metabolism and other essential functions.
Common Dosages
- 25 mcg, 50 mcg, 75 mcg, 100 mcg, 125 mcg, 150 mcg, 200 mcg, and 300 mcg tablets.
Typical Dosing
- The dose is individualized based on the patient’s age, weight, thyroid hormone levels, and response to treatment. A common starting dose for adults is 50 mcg to 100 mcg once daily.
Typical Dosing
FDA Approved Indications
- Hypothyroidism
- Pituitary TSH suppression, used in the management of goiters or thyroid cancer
Who Shouldn't Take Euthyrox?
- Untreated adrenal insufficiency
- Thyrotoxicosis
- Known hypersensitivity to levothyroxine
Advice From The Pharmacist
- Take Euthyrox on an empty stomach at least 30 minutes to 1 hour before breakfast for optimal absorption.
- Avoid taking calcium supplements, iron, antacids, or multivitamins within 4 hours of Euthyrox, as they can interfere with its absorption.
- Regular blood tests are necessary to monitor thyroid hormone levels and adjust the dosage.
- Contact your healthcare provider if you experience signs of hyperthyroidism (such as rapid heartbeat, nervousness, or weight loss) or hypothyroidism (fatigue, weight gain, or cold intolerance).
Side Effects of Euthyrox
Common Side Effects
- Headache
- Insomnia
- Weight changes
Uncommon/Severe Side Effects
- Hyperthyroidism (from overdose)
- Heart palpitations
- Osteoporosis (with long-term high doses)
Risks and Warnings of Euthyrox
- Overdose Risk: Excessive doses of Euthyrox can lead to hyperthyroidism, which may increase the risk of heart problems or bone loss.
- Pregnancy: Thyroid hormone needs may increase during pregnancy, and Euthyrox may require dose adjustments.
- Drug Interactions: Euthyrox can interact with certain medications, including warfarin, diabetes medications, and antacids.
Interactions with Euthyrox
Common Drug Interactions
- Calcium supplements and antacids: Can reduce the absorption of Euthyrox.
- Warfarin: May increase the effects of warfarin, increasing the risk of bleeding.
- Estrogens: Hormonal medications may alter thyroxine levels, requiring dose adjustments.
Alternatives to Euthyrox
- Synthroid: Another brand of levothyroxine sodium.
- Unithroid: A generic form of levothyroxine for thyroid hormone replacement.
- Armour Thyroid: A natural desiccated thyroid extract containing T4 and T3.
