What’s the difference between synthroid and levothyroxine

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Are you unsure about whether to choose synthroid or levothyroxine for your thyroid condition? It’s important to understand the distinctions between these medications to make an informed decision. While both synthroid and levothyroxine are used to treat hypothyroidism, they have some differences that may impact your health. Let’s explore the nuances of each medication to help you determine which option is right for you.

Main Features

Main Features

Levothyroxine is a synthetic form of the thyroid hormone thyroxine (T4). It is used to treat hypothyroidism, a condition where the thyroid gland does not produce enough thyroid hormone. Synthroid is a brand name for levothyroxine and is one of the most commonly prescribed thyroid medications.

Levothyroxine works by replacing the missing thyroid hormone in the body, helping to regulate metabolism and energy levels. It is essential for maintaining normal growth and development, controlling body temperature, and supporting the function of other body organs.

Key Benefits:

1. Helps to manage symptoms of hypothyroidism such as fatigue, weight gain, and depression.

2. Improves energy levels and metabolism.

3. Supports overall wellbeing and healthy thyroid function.

Uses and Benefits

Synthroid and levothyroxine are both synthetic forms of the thyroid hormone levothyroxine. They are commonly used to treat hypothyroidism, a condition where the thyroid gland does not produce enough thyroid hormone.

Some of the benefits of using Synthroid or levothyroxine include:

  • Regulating metabolism: These medications help regulate metabolism in the body, ensuring that essential bodily functions are performed efficiently.
  • Improved energy levels: By restoring hormone levels to normal, Synthroid and levothyroxine can help increase energy levels and reduce fatigue.
  • Weight management: Proper thyroid hormone levels are crucial for maintaining a healthy weight, and these medications can help in weight management.
  • Improved mood: Balanced thyroid hormone levels can have a positive impact on mood, helping to reduce symptoms of depression and anxiety.
  • Prevention of complications: Treating hypothyroidism with Synthroid or levothyroxine can help prevent complications such as heart disease, infertility, and other health issues associated with untreated hypothyroidism.
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Dosage and Administration

Dosage and Administration

It is important to follow your healthcare provider’s instructions when taking synthroid or levothyroxine. The dosage will vary depending on your individual needs, medical condition, and response to treatment. Typically, the starting dose for adults with hypothyroidism is 50-100 mcg per day, with adjustments made based on thyroid hormone levels and symptoms.


Take this medication by mouth as directed by your doctor, usually once daily on an empty stomach, at least 30 minutes to 1 hour before breakfast. It is best to take this medication at the same time each day to maintain a consistent level in your bloodstream.

Your doctor may also recommend regular blood tests to monitor your thyroid hormone levels and adjust your dosage accordingly. Do not stop taking this medication without consulting your doctor, as it may take time to see the full effects of the treatment.

Possible Side Effects

It is important to be aware of the possible side effects that may occur while taking synthroid or levothyroxine. Common side effects may include:

Mild Side Effects

Serious Side Effects

  • Headache
  • Nervousness
  • Insomnia
  • Weight loss
  • Chest pain
  • Rapid or irregular heartbeat
  • Excessive sweating
  • Difficulty breathing

If you experience any severe or persistent side effects, it is important to contact your healthcare provider immediately. They can provide guidance on how to manage these side effects and determine if any changes to your medication are necessary.