Health topics
… Overview of synthroid (levothyroxine) is a thyroid hormone replacement therapy (TRT) used to treat hypothyroidism and. It works by binding to thyroid hormone receptors and reducing the production of thyroid hormone, which helps to regulate the body’s. Levothyroxine (Synthroid) is available in tablet form and is the generic form of levothyroxine. This medication is a synthetic form of the thyroid hormone thyroxine (T4). Levothyroxine replaces or replaces or replacing the body’s missing thyroid hormone. It is a medication that helps to regulate and restore the body’s thyroid hormone levels. When you are under the impression that you are taking any medication, it’s best to consult with a physician to determine the correct medication.
… Common side effects of levothyroxine include:
… Uses of levothyroxine levothyroxine is used to treat and prevent thyroid disease and. The levothyroxine dose should not be increased without first consulting your doctor.
… More Common side effects of levothyroxine include:
Medically reviewed by Jessica Swirble, PharmDLast updated on March 26, 2025
Drug Information| | |
Levothyroxine is a synthetic form of thyroxine (T4) used to treat hypothyroidism (underactive thyroid). It is also used to treat thyrotoxicosis (overactive thyroid). Levothyroxine is used to treat thyrotoxicosis symptoms caused by congenital thyroid disorders such as hypogonadism, tachyphylaxis (overactive thyroid), and symptoms of pulmonary hypertension (high blood pressure in the lungs).
Levothyroxine is used to treat various conditions in which thyroid hormone levels are decreased or absent. For example, levothyroxine is used to treat infertility in infertile women. It is also used to treat hypothyroidism and hypogonadism. It works by helping to restore thyroid hormone levels when thyroid hormone levels become low.
Levothyroxine is classified as a thyroid hormone replacement therapy (TRT) in the United States Patent No. 'Leod-30,924 issued on May 26, 1967. It was approved for the treatment of hypothyroidism (underactive thyroid) in adults. The '24 Licensee states that this medication may be used in the treatment of hypothyroidism in children (underactive thyroid) as early as six months of age. It may also be used in the treatment of thyrotoxicosis symptoms caused by hypogonadism (overactive thyroid).
In addition to the aforementioned medication, Levothyroxine also contains:
The '24 Licensee further clarifies that 'Levothyroxine is not suitable for use in the treatment of hypothyroidism in children (underactive thyroid) as early as six months of age. It should not be used in the treatment of infertility in infertile women.
It is very important to consult a healthcare professional before starting any TRT, including TRT tablets.
There is no significant difference in the dosage of the '24 Licensee's 'Thyroid Replacement Therapy' (TRT) compared to the 'normal' dosage of 'normal' levothyroxine (NDT), 'normal' DDT (NDT solution), or 'DNDT' (NDT patch). However, there is a slight increase in dosage of 'Thyroid Replacement Therapy' tablets compared to the dosage of the 'DNDT' tablets.
It is recommended that you consult your doctor before beginning treatment with any TRT tablets.
There is no significant difference in the dosage of 'Thyroid Replacement Therapy' tablets compared to the dosage of the 'DNDT' tablets.
There is a slight decrease in the dosage of 'Thyroid Replacement Therapy' tablets compared to the dosage of the 'DNDT' tablets.
It is recommended that you consult your doctor before starting any TRT, including 'Thyroid Replacement Therapy' tablets.
There is a slight increase in dosage of 'Thyroid Replacement Therapy' tablets compared to the dosage of the 'DNDT' tablets.
NDT is a female sex hormone. It is a type of T4 hormone. It is also known as T4 or T3. It helps regulate menstrual cycles, sperm production, and testosterone levels in hypothyroidism symptoms (underactive thyroid).
NDT is typically used for purposes other than those listed in a '24-hour' medication supply.
NDT tablets are also available in a liquid form. These tablets are usually applied directly to the scalp or other areas of the body where the medication is being given.
Levothyroxine is used to treat hypothyroidism by restoring normal thyroid hormone levels. It is also used to treat goiters not absorbing thyroid hormone, thyroid cancer, and other thyroid disorders.
Levothyroxine is also used to treat hypothyroidism by restoring normal hormone levels, and to treat thyroid nodules in children and teenagers.
Synthroid is an oral levothyroxine tablet that is taken once a day. Synthroid replaces the amount of thyroid hormone in the body. It is important to follow the dosage instructions provided by your doctor. Take Synthroid with a meal.
Levoxyl is a synthetic thyroid hormone replacement drug that replaces the amount of thyroxine (T4) produced by the body. Levoxyl replaces the body's production of a thyroid hormone called triiodothyronine (a precursor of cells that make T4). Levoxyl replaces the body's lack of thyroid hormone. Levoxyl may be used alone or in combination with a thyroid hormone replacement drug.
Levothyroxine is an oral tablet that is taken once a day. Levothyroxine is important to help the body recover from hypothyroidism and to replace thyroid hormones produced in the body. It is important to take Levothyroxine with a meal.
Levoxoxyl replaces the body's lack of thyroid hormone. Levoxoxoxyl may be used alone or in combination with a thyroid hormone replacement drug.
Levothyroxine sodium is a synthetic drug used to treat hypothyroidism and to replace the body's production of thyroid hormones. Levothyroxine sodium may be used for treating other conditions, like thyroid disease.
The most common side effects of Levothyroxine are: nausea, vomiting, diarrhea, or stomach pain.
Levothyroxine sodium may cause weight gain, irregular or absent menstrual periods, or irregular heartbeats. If you notice any of these side effects, contact your doctor immediately.
Contact your doctor immediately if you experience these symptoms.
Do not take Levothyroxine if you are allergic to levothyroxine sodium, or if you have a history of heart problems or stroke. Consult your doctor before taking levothyroxine if you are pregnant or breastfeeding. Inform your doctor of any history of thyroid disease. Inform your doctor of your family doctor about any family history of thyroid disease if you are currently taking levothyroxine sodium. Inform your doctor of any family history of thyroid disease if you are currently taking levothyroxine sodium.
Do not take levothyroxine if you are taking thyroxine. Do not take thyroid medication with levothyroxine sodium. Before you take levothyroxine, inform your doctor about all of your medical conditions, including:
Tell your doctor immediately if you have an irregular heartbeat, a heart rhythm problem (such as a heart attack or irregular heartbeat), low magnesium levels in your blood, an enlarged thyroid gland, or if you have a condition called hypothyroidism (underactive thyroid).
rated 4.33/5 in 454 reviewsfrom verified Dr Fox customers.
I have only been using Dr Fox for my hypothyroidism for the last 1.5 yrs. I have gained weight and am now struggling to do more than keep my weight down. I have been using Synthroid for over 3 yrs and I am getting very tired each day. Any advice is greatly appreciated.
J - Z
Was seeded up to be used at a lower dose than Synthroid but I have been using it for 4 yrs now and I cannot lose my appetite. I am going to use Synthroid but would be really appreciate any ideas on how I can get the most out of this.
M - J
Synthroid has been an amazing support and medication for me. It has been my go to medication for so long. I would recommend Dr Fox to others looking to lose weight and keep it off.
Thank you for your review and sorry to hear my thyroid was not getting better and my weight was not keeping up. I cannot lose weight anymore but I would recommend Dr Fox again.
Thank you for your review and sorry to hear my weight was not keeping up. I will probably try Synthroid again next month. I will start using the higher dose of Synthroid as well and hope to get back on track with losing weight soon.
Synthroid has been a blessing to my end and my energy has definitely been wasted. I cannot stress but I have found Dr Fox to be a great helpful and quick fix.
Thank you Dr Fox for your review and sorry to hear my weight was not keeping up. I cannot lose weight anymore but I will definitely use Dr Fox again.
Synthroid has been a amazing support and medication for me. I would recommend Dr Fox again to others looking to lose weight and keep it off.
You are exactly right on your journey. Dr Fox helped me in the first place and I would recommend it again. Thank you Dr Fox for your review and sorry to hear your weight was not keeping up.
Hi Z, I was prescribed Synthroid because of my weight and my energy. Dr Fox prescribed Synthroid because my weight was not keeping up. I am not sure why but my energy levels have dropped. My weight has now dropped to just under 5 kgs and my energy is still too low to lose weight.
Hi Dr Fox, Your review and Dr Fox advice was right on your journey. I used to be overweight and my weight was always too high to lose weight. But when I used to be able to lose weight but not to eat as I used to be. I lost about 9 kgs in a year and have only gained 2.5 kgs over the past 5 yrs. Dr Fox helped me in the first place and I am now able to eat less and still be able to lose weight. I have gained almost 5 kgs per week now. Thanks for your review and sorry to hear your weight was not keeping up. Thank you Dr Fox again and sorry to have happened to you.
Thank you Dr Fox for your review and sorry to think my weight was not keeping up with my weight. I am going to start using the higher dose of Synthroid once I get used to it. If that happens, I will start using the levothyroxine. I have gained 4 kgs per week but I cannot lose weight anymore. I have gained about 5 kgs a week and I am looking forward to using Dr Fox again in the future. Thank you Dr Fox again for your review and sorry to have happened to you.
Synthroid (Levothyroxine) is a medication used to treat hypothyroidism. It contains the active ingredient levothyroxine, and it works by replacing the missing thyroid hormone. It is available in tablet form and is often used in conjunction with a medical or surgical procedure.
Synthroid (Levothyroxine) is a synthetic form of the thyroid hormone that is produced by the thyroid gland. It works by replacing the missing thyroid hormone in your body. Synthroid is used to treat hypothyroidism and is used to reduce the symptoms of the thyroid disease. It is also used to treat certain thyroid cancers.
The recommended dose is one tablet per day, as directed by your doctor. It may be taken with or without food, but it is important to take it at the same time each day. If you miss a dose, take it as soon as you remember. If it is close to the time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take two doses at once.
Side effects of Synthroid (Levothyroxine) may include:
If you experience any of these symptoms, stop taking Synthroid (Levothyroxine) and call your doctor right away.
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