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Compare Levoxyl vs. Synthroid

Head-to-head comparisons of medication uses, side effects, warnings, and more.

  • Levoxyl (levothyroxine)
    Synthroid (levothyroxine)
  • Levoxyl (levothyroxine)
    Synthroid (levothyroxine)

  • Summary of Levoxyl vs. Synthroid

    Summary for Thyroxine (T4)
    Prescription only

    Levoxyl (levothyroxine) is a thyroid hormone used to treat hypothyroidism, or low thyroid hormone levels, in children and adults. It's also FDA approved to treat a certain type of thyroid cancer. The medication comes as a tablet that you take once a day by mouth on an empty stomach, typically in the morning. Regular blood tests are needed to keep your dose within the right range. Common side effects are usually related to taking too much and can include fast heartbeat, headache, trouble sleeping, or weight loss.

    Summary for Thyroxine (T4)
    Prescription only

    Synthroid (levothyroxine) is a thyroid hormone used to treat low thyroid hormone levels (hypothyroidism) in both children and adults. It's also used to treat a certain type of thyroid cancer. The medication comes as tablets in many different strengths. It's taken once a day by mouth, usually on an empty stomach in the morning. You'll need regular blood tests to make sure you're getting the right dose. Side effects can include headache, trouble sleeping, and weight loss.

  • Indications of Levoxyl vs. Synthroid

    Indications for
    •Hypothyroidism (low thyroid hormone levels)
    •Thyroid cancer, together with radioactive iodine and surgery
    Indications for
    •Hypothyroidism (low thyroid hormone levels)
    •Thyroid cancer, together with radioactive iodine and surgery

  • Pros and Cons of Levoxyl vs. Synthroid

    Pros and Const for Thyroxine (T4)
    Pros
    •First-choice medication for treating low thyroid hormone levels
    •Safe to use during pregnancy
    •Only needs to be taken once a day
    •Can be taken by both children and adults
    Cons
    •Must be taken on an empty stomach
    •Might take several weeks to find the right dose
    •Requires regular blood tests
    •Interacts with many foods, medications, and supplements
    Pros and Const for Thyroxine (T4)
    Pros
    •First-choice medication for treating low thyroid hormone levels
    •Safe to use during pregnancy
    •Only needs to be taken once a day
    •Can be taken by both children and adults
    Cons
    •Must be taken on an empty stomach
    •Might take several weeks to find the right dose
    •Requires regular blood tests
    •Interacts with many foods, medications, and supplements

  • Common Side Effects of Levoxyl vs. Synthroid

    Common Side Effects for

    Signs of having too much thyroid hormones in the body, such as:

    •Irregular heartbeat
    •Chest pain
    •Shortness of breath
    •Leg cramps
    •Headache
    •Nervousness
    •Hives or skin rash
    •Irritability
    •Trouble sleeping
    •Tremors
    •Muscle weakness
    •Change in appetite
    •Weight loss
    •Vomiting
    •Diarrhea
    •Sweating a lot
    •Sensitivity to heat
    •Fever
    •Changes in menstrual period
    Common Side Effects for

    Signs of having too much thyroid hormones in the body, such as:

    •Irregular heartbeat
    •Chest pain
    •Shortness of breath
    •Leg cramps
    •Headache
    •Nervousness
    •Hives or skin rash
    •Irritability
    •Trouble sleeping
    •Tremors
    •Muscle weakness
    •Change in appetite
    •Weight loss
    •Vomiting
    •Diarrhea
    •Sweating a lot
    •Sensitivity to heat
    •Fever
    •Changes in menstrual period

  • Warnings of Levoxyl vs. Synthroid

    Common Side Effects for
    •Not for weight loss
    •Heart problems
    •Adrenal crisis in people with adrenal insufficiency
    •Worsening diabetes
    •Bone loss
    Common Side Effects for
    •Not for weight loss
    •Heart problems
    •Adrenal crisis in people with adrenal insufficiency
    •Worsening diabetes
    •Bone loss

  • Prices with our coupons for Levoxyl vs. Synthroid

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    Learn more about Synthroid

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