Levothyroxine prescribing information

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Discover the benefits of levothyroxine: Are you looking for a reliable and effective treatment for hypothyroidism? Levothyroxine might be the solution you’ve been seeking. This medication is commonly prescribed to help restore thyroid hormone levels in patients with an underactive thyroid gland. By taking levothyroxine as directed by your healthcare provider, you can experience improved energy levels, metabolism, and overall well-being.

Important considerations: It’s essential to follow your doctor’s instructions carefully when taking levothyroxine. Be sure to take the medication at the same time each day, avoid certain foods and medications that can interfere with its absorption, and attend regular check-ups to monitor your thyroid function. With proper management and adherence to your treatment plan, you can enjoy the benefits of a balanced thyroid hormone level.

Consult your healthcare provider: If you think levothyroxine may be the right treatment for you, schedule an appointment with your healthcare provider to discuss your symptoms and medical history. They can provide personalized guidance on using levothyroxine safely and effectively to manage your hypothyroidism. Take control of your health today with levothyroxine.

Usage and Dosage:

Levothyroxine is typically taken orally, once daily in the morning. It is important to take this medication exactly as prescribed by your healthcare provider. The dosage of Levothyroxine is individualized based on the patient’s age, weight, and medical condition. It is important not to adjust the dosage without consulting a healthcare professional.

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Age Group Dosage
Infants 10-15 mcg/kg/day
Children 1-2 mcg/kg/day
Adults 1.6 mcg/kg/day

It is recommended to take Levothyroxine on an empty stomach at least 30-60 minutes before breakfast. Avoid taking Levothyroxine with food, as certain foods and medications can interfere with its absorption. If a dose is missed, take it as soon as remembered, unless it is almost time for the next dose. In that case, skip the missed dose and resume the regular dosing schedule. Do not double the dose to catch up.

Usage and Dosage

Levothyroxine should be taken exactly as prescribed by your healthcare provider. The dosage of Levothyroxine is based on your medical condition, response to treatment, weight, and other medications you may be taking. It is important to take Levothyroxine at the same time every day, preferably in the morning on an empty stomach, at least 30 minutes before eating.

Do not stop taking Levothyroxine without consulting your healthcare provider, as sudden discontinuation may lead to adverse effects. If you miss a dose, take it as soon as you remember, but do not take a double dose to make up for the missed one.

It is important to follow the administration instructions provided by your doctor to ensure the proper absorption of Levothyroxine and maximize its effectiveness in treating your condition.

Administration Instructions

When administering Levothyroxine, it is important to follow these guidelines:

1. Take Levothyroxine exactly as prescribed by your healthcare provider.
2. It is usually taken once a day on an empty stomach, at least 30 minutes before eating.
3. Swallow the tablet whole with a full glass of water.
4. Do not crush, chew, or split the tablet.
5. Do not take Levothyroxine within 4 hours of taking any products that contain calcium or iron.
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Following these administration instructions will help ensure the effectiveness of Levothyroxine treatment.

Warnings and Precautions

Before taking Levothyroxine, it is important to be aware of certain warnings and precautions:

1. Interactions

  • Levothyroxine can interact with certain medications, such as antacids, iron supplements, and cholestyramine, affecting its effectiveness. It is important to discuss all medications and supplements with your healthcare provider.
  • Some medications can increase the risk of side effects when taken with Levothyroxine, so it is crucial to inform your doctor of all medications you are currently taking.

2. Conditions

  • Patients with certain medical conditions, such as cardiovascular disease, diabetes, or adrenal insufficiency, may require special monitoring while taking Levothyroxine.
  • Pregnant women or those planning pregnancy should consult their healthcare provider before taking Levothyroxine, as dosage adjustments may be necessary.

It is essential to follow your healthcare provider’s instructions carefully and report any unusual symptoms or side effects while taking Levothyroxine.

Drug Interactions

Drug Interactions

Levothyroxine may interact with other medications, supplements, or foods. It is important to inform your healthcare provider about all the medications you are taking, including prescription and over-the-counter drugs, as well as any herbal supplements.

Some common drug interactions with Levothyroxine include:

Drug Effect
Warfarin Levothyroxine can alter the effects of warfarin, leading to changes in blood coagulation. Monitoring may be required.
Antacids Antacids containing aluminum or magnesium may decrease the absorption of Levothyroxine. It is recommended to take them at least 4 hours apart.
Cholestyramine Cholestyramine binds to Levothyroxine in the intestine, reducing its absorption. These medications should be separated by at least 4 hours.
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These are just a few examples of drug interactions with Levothyroxine. Always consult your healthcare provider or pharmacist before starting or stopping any medications while taking Levothyroxine to prevent potential interactions.

Side Effects

Side Effects

Levothyroxine may cause various side effects in some patients. It is important to be aware of these potential side effects while taking this medication. Common side effects may include:

Common Side Effects Less Common Side Effects
Fatigue Irregular heartbeat
Weight loss Chest pain
Headache Nervousness
Difficulty sleeping Excessive sweating

Seek Medical Attention

If you experience any severe side effects or symptoms such as severe allergic reactions, chest pain, or difficulty breathing, seek immediate medical attention. It is important to consult your healthcare provider if you have any concerns about the side effects of levothyroxine.

Storage and Handling

Levothyroxine should be stored at room temperature between 68°F to 77°F (20°C to 25°C).


  • Keep Levothyroxine in its original container tightly closed.
  • Avoid exposure to extreme heat or cold.
  • Keep the medication out of reach of children.


  • Handle Levothyroxine with clean, dry hands.
  • Avoid touching the tablets directly with wet hands.
  • Do not remove the tablets from the blister pack until ready to take them.