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Contents
Common use
Synthroid (levothyroxine sodium) is a synthetic form of the thyroid hormone T4, used to treat hypothyroidism a condition where the thyroid gland does not produce enough hormone.
It helps restore energy levels, support metabolism, regulate body temperature, and improve mood and focus. Synthroid may also be used in certain cases of goiter and to manage thyroid cancer.
Dosage and direction
Synthroid is taken once a day, usually in the morning 30 to 60 minutes before breakfast, on an empty stomach.
Dosage is highly individualized, depending on your age, weight, thyroid levels, and response. Starting doses range from 25 mcg to 100 mcg daily, with gradual adjustments.
Swallow tablets whole with a full glass of water. Do not crush or split unless directed.
Precautions
Before using Synthroid, inform your doctor if you have:
Heart disease
Diabetes
Osteoporosis
Adrenal gland problems
Any recent surgery or severe illness
Use caution if you are elderly or pregnant. Thyroid levels should be monitored frequently. Take Synthroid at the same time each day for best results.
Contraindications
Do not take Synthroid if you:
Are allergic to levothyroxine
Have untreated thyrotoxicosis
Have uncorrected adrenal insufficiency
Are recovering from a heart attack
This medication is not intended for weight loss. Misuse in large doses may cause serious or fatal health effects.
Possible side effects
Side effects may occur if your dose is too high. They include:
Chest pain
Palpitations
Nervousness or anxiety
Sweating
Hair loss (temporary, mostly in children)
Less common but serious effects:
Irregular heartbeat
Seizures
Muscle weakness
Contact your doctor if symptoms of hyperthyroidism or allergic reaction appear.
Drug interactions
Synthroid may interact with:
Antacids (aluminum, calcium)
Iron supplements
Warfarin
Diabetes medications
Antidepressants
Take Synthroid at least 4 hours apart from supplements containing iron, calcium, or magnesium to avoid reduced absorption.
Missed dose
If you miss a dose, take it as soon as possible. If it's close to your next dose, skip the missed one. Never take 2 doses at once.
Overdose
Symptoms of overdose include fast heartbeat, confusion, tremors, and chest pain. Severe cases can be life-threatening. Seek emergancy care immediately.
Storage
Store Synthroid tablets at room temperature (68F-77F / 20C-25C) in a dry place away from moisture and heat. Keep out of reach of children and pets.
U.S. Sale and Prescription Policy
Synthroid is an FDA-approved prescription medication in the United States.
It can only be obtained with a valid prescription from a licensed healthcare provider. Regular lab testing is typically required to adjust and maintain the correct dosage.
Synthroid is not available over-the-counter and should not be used for weight loss or performance enhancement due to risk of serious side effects.
Disclaimer
This material is for informational purposes only and does not substitute medical advice. Always consult your doctor or pharmacist before starting or stopping any medication. We are not responcible for misinterpretation or misuse of the presented content.