If you develop these symptoms while taking Synthroid, talk with your doctor. They can test your thyroid hormone levels and reduce your dosage if needed. Your doctor will adjust your dosage as needed during your Synthroid treatment. Why this is done can vary from person to person. If you have questions about what your dosage should be, talk with your doctor. Synthroid comes as tablets that are taken by mouth once per day, without food. In general, the drug should be taken at about the same time each day, on an empty stomach 30 minutes to 1 hour before or after eating.
But make sure to take Synthroid exactly as prescribed by your doctor. You should also take Synthroid at least 4 hours before or after certain drugs that can affect how effective Synthroid is. See the this article for a list of drugs that can interact with Synthroid. And make sure to talk with your doctor or pharmacist about all of the medications you use before starting Synthroid. If you miss a dose of Synthroid, take it as soon as you remember. Do not double up on Synthroid doses to make up for a missed dose.
Doing this can increase your risk for side effects from the drug. If you need help remembering to take your dose of Synthroid on time, try using a medication reminder.
This can include setting an alarm, downloading a reminder app, or setting a timer on your phone. A kitchen timer can work, too. Using more than this can lead to serious side effects, likely due to hyperthyroidism having too much thyroid hormone in your body. You can also call to reach the American Association of Poison Control Centers, or use their online resource. However, if you have severe symptoms, call or your local emergency number immediately or go to the nearest emergency room.
The sections above describe the typical dosages provided by the drug manufacturer. Only take Synthroid exactly as prescribed. Talk with your doctor if you have questions or concerns about your current dosage.
Disclaimer: Healthline has made every effort to make certain that all information is factually correct, comprehensive, and up to date. However, this article should not be used as a substitute for the knowledge and expertise of a licensed healthcare professional.
If you have other questions about Synthroid dose adjustments and side effects, talk with your doctor or pharmacist. Synthroid is a synthetic artificial thyroid hormone. Your body also naturally makes thyroid hormones. For this reason, Synthroid overdose can cause the same symptoms as hyperthyroidism high thyroid hormone levels.
Another option is to call the American Association of Poison Control Centers at or use its online tool. If you have severe symptoms, immediately call or your local emergency number, or go to the nearest emergency room. If your Synthroid dosage needs to be adjusted, your doctor will likely adjust it in amounts of For people with newly diagnosed hypothyroidism, dosage adjustments will likely happen every 4 to 6 weeks.
This is the amount of time it can take the drug to have its full effects for treating hypothyroidism. Your doctor may continue to adjust your Synthroid dosage until your thyroid hormone levels are in a normal range. Synthroid is approved to treat a type of thyroid cancer in certain situations. They may adjust your Synthroid dosage depending on these levels. Typically, the goal of treatment is for TSH levels to be below 0.
Synthroid should be taken on an empty stomach, once daily. Specifically, it should be taken 30 minutes to 1 hour before or after eating. But your doctor may also discuss how to take Synthroid at night. In some cases, your body can absorb the drug better if you take Synthroid at night. For more information about drug interactions with Synthroid, refer to this article. They can recommend the best time for you to take your next dose.
Missing a dose of Synthroid could cause your thyroid hormone levels to decrease. This could lead to side effects. This can include setting an alarm or timer on your phone or downloading a reminder app. A kitchen timer can work, too.
With withdrawal, you have unpleasant symptoms when you stop taking a drug that your body has become dependent upon. Stopping Synthroid can also affect other medical conditions you have or other medications you take. Although TSH is the best test for most patients on thyroxine replacement, those who have pituitary disease or previous pituitary surgery or radiation, are usually followed with measurement of free thyroxine, rather than a TSH.
Take a look at our Patient Web Brochure Hypothyroidism to learn more about hypothyroidism and how it is treated. Medical Disclaimer The information contained in or made available through the American Thyroid Association Website is not intended to replace the services of a trained health professional or to be a substitute for medical advice of physicians.
The user should consult a physician in all matters relating to his or her health, and particularly in respect to any symptoms that may require diagnosis or medical attention. However, serum T4 levels are usually normal but may occasionally be slightly increased.
Actions of particular beta-adrenergic antagonists may be impaired when a hypothyroid patient is converted to the euthyroid state. However, long-term glucocorticoid therapy may result in slightly decreased T3 and T4 levels due to decreased TBG production See above. Amiodarone inhibits peripheral conversion of levothyroxine T4 to triiodothyronine T3 and may cause isolated biochemical changes increase in serum free-T4, and decreased or normal free-T3 in clinically euthyroid patients.
In euthyroid patients, doses within the range of daily hormonal requirements are ineffective for weight reduction. Larger doses may produce serious or even life-threatening manifestations of toxicity, particularly when given in association with sympathomimetic amines such as those used for their anorectic effects.
Patient Site. Full Prescribing Information. Indication and Important Safety Information. Contact Medical Information. Hypothyroid medications require precise dosing and careful monitoring. Please enter a valid numerical weight. Please enter a valid weight using only whole numbers. Please enter a weight between 2 to 3 digits.
Non-elderly, otherwise healthy individuals with hypothyroidism for a short time. Begin at full replacement dose: 1.
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