Treatment FAQ

what are the side effects of thyroxine treatment

by Gracie Graham Published 3 years ago Updated 2 years ago
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The more common side effects of levothyroxine can include:

  • increased appetite
  • weight loss
  • heat sensitivity
  • excessive sweating
  • headache
  • hyperactivity
  • nervousness
  • anxiety
  • irritability
  • mood swings

More items...

Levothyroxine may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:
  • weight gain or loss.
  • headache.
  • vomiting.
  • diarrhea.
  • changes in appetite.
  • fever.
  • changes in menstrual cycle.
  • sensitivity to heat.
Feb 15, 2019

Full Answer

Does thyroxine have side effects?

Dec 02, 2021 · In severe cases, levothyroxine may cause the following side effects: Vomiting Blurred vision Dizziness Eye pain Pain in your hip or knee Shortness of breath Chest pain or tightness (angina) Irregular heartbeat Palpitations and arrhythmias Tremors Swelling Hives Skin rash Severe fatigue Severe ...

How does thyroxine affect the body?

Nov 01, 2021 · At least once a week, we have patients coming into our clinic who are experiencing thyroid medication side effects like: Fatigue Chest pain Hair loss Irregular heartbeat/palpitations Insomnia Skin rash/flushing Excessive sweating Nervousness Irritability Other symptoms of hyperthyroidism [ 1]

What are the effects of thyroxine?

Ans: No, taking higher than the recommended dose of this medication can lead to increased chances of side effects such as Irregular heartbeat, Flushing, High temperature, Restlessness, Sweating, Diarrhoea, Headache, Vomiting, Irregular periods, Tremor, Irregular heartbeat, Difficulty sleeping, and Muscle weakness.

What are the long term side effects of taking Synthroid?

Jan 15, 2022 · Check with your doctor immediately if any of the following side effects occur while taking levothyroxine: Less common Chest pain or discomfort decreased urine output difficult or labored breathing difficulty with swallowing dilated neck veins extreme fatigue fainting fast, slow, irregular, pounding, or racing heartbeat or pulse fever

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What are the long term side effects of thyroxine?

The long-term effects of thyroid medication include weight fluctuations, sensitivity to heat, joint pain, changes to your menstrual cycle, and possibly even autoimmune dysfunction.Dec 2, 2021

Does thyroxine have any side effects?

It happens rarely, but some people may have serious side effects when taking levothyroxine. Tell your doctor or contact 111 now if: you get fast or irregular heartbeats (palpitations)

Can thyroid medication harm you?

Dangerous side effects or death can occur from the misuse of levothyroxine, especially if you are taking any other weight-loss medications or appetite suppressants. Since thyroid hormone occurs naturally in the body, almost anyone can take levothyroxine.Apr 9, 2021

What foods should I avoid when taking levothyroxine?

levothyroxine food In addition, absorption of levothyroxine may be decreased by foods such as soybean flour, cotton seed meal, walnuts, dietary fiber, calcium, and calcium fortified juices. These foods should be avoided within several hours of dosing if possible.

What are the most common side effects of thyroid medications?

What side effects can this medication cause?weight gain or loss.headache.vomiting.diarrhea.changes in appetite.fever.changes in menstrual cycle.sensitivity to heat.More items...•Feb 15, 2019

Is it better to take thyroxine at night or in the morning?

There is consensus that levothyroxine should be taken in the morning on an empty stomach. A pilot study showed that levothyroxine intake at bedtime significantly decreased thyrotropin levels and increased free thyroxine and total triiodothyronine levels.

What are the signs of too much thyroid medication?

Symptoms of severe overtreatment include:Anxiety.Mood swings.Hand tremors.Diarrhea.Muscle weakness, mainly in the thighs and shoulders.Weight loss.Inability to sleep and/or focus.Abnormally increased heart rate, even at rest.More items...•Sep 9, 2020

What are early warning signs of thyroid problems?

7 Early Warning Signs of Thyroid IssuesFatigue.Weight gain.Weight loss.Slowed heart rate.Increased heart rate.Sensitivity to heat.Sensitivity to cold.Jan 11, 2021

Why do you have to drink a full glass of water with levothyroxine?

The Levoxyl-branded tablet may rapidly swell and disintegrate, and cause choking or gagging if it becomes stuck in your throat. Take with a full glass of water, but talk with your doctor should you have difficulty swallowing it.Feb 25, 2022

Does levothyroxine affect sleep?

Side effects of thyroxine can also cause difficulty sleeping if the dose is too high.Jan 6, 2022

Can I drink coffee after taking levothyroxine?

8) You take your Synthroid or levothyroxine with coffee In studies, coffee reduced the body's absorption of thyroid medications by about 30%. That's why experts recommend that you wait at least 60 minutes after drinking coffee to take your thyroid replacement medication.Mar 20, 2020

Is banana good for thyroid?

Hypothyroid persons can take all fruits including banana in moderation.

What is levothyroxine?

Levothyroxine is a thyroid medication made up of synthetic thyroid hormone. It is the primary treatment for hypothyroidism ( underactive thyroid ), especially for anyone with a goiter or after thyroid cancer or thyroid resection.

Levothyroxine Side Effects

Levothyroxine can cause a long list of side effects — some are common, others severe.

Levothyroxine Interactions

Several drugs, activities, and conditions do not mix well with levothyroxine.

Special Considerations for Taking Levothyroxine

Avoid eating within an hour of taking levothyroxine. Schedule your hypothyroidism diet meals and levothyroxine dosage hours apart. A consistent schedule is easier to keep to. Many people tend to take their medication immediately upon waking for convenience, then eat an hour later.

Dosage for Hypothyroidism

Depending on your diagnosis and doctor recommendation, typical dosages of levothyroxine for hypothyroidism include:

Warnings & Outlook

Do not over-treat or under-treat with levothyroxine. Adverse effects can drastically impact your quality of life if you veer from the prescribed dosage.

What are the effects of thyroxine?

Effects of improper thyroxine levels 1 weight gain or loss 2 softening of the enamel of the teeth 3 depression 4 panic attacks 5 nausea 6 palpitations 7 tremors 8 diarrhea 9 excessive sweating 10 restlessness 11 muscle fatigue or cramps 12 insomnia 13 headaches

What are the symptoms of taking thyroxine?

if you begin to have symptoms of anxiety, drastic changes in appetite, weakness or fatigue, headaches or nausea, insomnia, excessive sweating, or night sweats talk to your physician .

What hormones are produced by the thyroid?

thyroxine is a synthetic hormone that closely resembles the hormone secreted by the thyroid that regulates metabolism, body temperature, and other body functions. without the proper levels of this important hormone, your body responds with several possible symptoms such as fatigue, depression, weight loss or gain, hot flashes, or chills.

Why is proper regulation of thyroid function important?

proper regulation of normal thyroid function is necessary to keep the body performing at peak efficiency. proper regulation of the preferred drug of treatment for thyroid conditions is equally important. thyroxine is a drug of extremes. prescribed under the names Levothroid, Levoxyl, Synthroid, Unithroid it is very helpful in the regulation ...

Why is it important to keep track of your reactions to thyroxine?

keeping track of the little improvements can help you be patient, and it also is a great morale boost. there are other important reasons for keeping close track of all of your body’s reactions, even the good ones when taking thyroxine or other natural supplements for thyroid conditions.

How to help a failing thyroid?

getting lots of natural iodine in your system can help a failing thyroid. kelp is a fantastic source of iodine as are many forms of seafood. you can take a supplement or include it in your diet to stimulate the thyroid and help it increase its natural production of thyroxine.

How to boost thyroid function?

drink water! cut out all the sugary sodas, and even diet sodas. cut back on caffeine and even fruit juices that often have high levels of sugar and drench your body with pure, natural plain water. it is a great way to boost your thyroid function and lose weight at the same time.

What are the side effects of a syringe?

Side effects requiring immediate medical attention 1 Chest pain or discomfort 2 decreased urine output 3 difficult or labored breathing 4 difficulty with swallowing 5 dilated neck veins 6 extreme fatigue 7 fainting 8 fast, slow, irregular, pounding, or racing heartbeat or pulse 9 fever 10 heat intolerance 11 hives or welts, skin itching, rash, or redness 12 irregular breathing 13 irritability 14 menstrual changes 15 nausea 16 pain or discomfort in the arms, jaw, back, or neck 17 sweating 18 swelling of the eyes, face, lips, throat, or tongue 19 tightness in the chest 20 tremors

Can euthyroidism cause weight loss?

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.

Does levothyroxine go away?

Some side effects of levothyroxine may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Does overtreatment with a syringe increase heart rate?

The clinical significance of these changes remains to be determined. Overtreatment with this drug may cause an increase in heart rate, cardiac wall thickness, and cardiac contractility and may precipitate angina or arrhythmias, particularly in patients with cardiovascular disease and in elderly patients.

Does levothyroxine cause side effects?

Side effects requiring immediate medical attention. Along with its needed effects, levothyroxine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. Check with your doctor immediately if any of the following side effects occur while taking levothyroxine:

Why Understanding Your Numbers Is Critical to Getting the Proper Treatment

At least once a week, we have patients coming into our clinic who are experiencing thyroid medication side effects like:

Thyroid Function 101

Your thyroid gland is a small, butterfly-shaped gland that wraps around your trachea at the front of your neck. It’s part of the endocrine system and produces important hormones that help regulate your energy, digestion, body weight, temperature, sex hormones, cardiovascular function, and nervous system.

Symptoms of Hypothyroidism

Since your thyroid regulates so many important functions in your body, when it’s inflamed, a myriad of symptoms can pop up. I’ll only focus on hypothyroid (underactive thyroid) symptoms, but often (not always), a hyperthyroid issue creates the opposite problem of hypo-.

Potential Thyroid Medication Side Effects

All drugs have potential side effects, some more serious than others. While levothyroxine tends to have rare serious side effects when used properly, it’s important to know all of the potential thyroid medication side effects.

Should You Be Taking Thyroid Medication?

So how do you know if you should be taking thyroid medicine? I mentioned blood work, and that really is the place to start. You need to know your baseline before taking any steps to address the symptoms that are leading you to believe that you have thyroid disease.

The Bottom Line

Thyroid medication side effects are rare but often occur when a patient is overmedicated for subclinical hypothyroidism or “sluggish thyroid”. In a case like this, the meds not only create more problems than they solve, but they also may be covering up another problem, like gut health issues.

How to take thyroxine?

Ans: Take Thyroxine as advised by your doctor. It should be taken orally preferably before breakfast or as a first meal of the day. It should be swallowed whole with plenty of water.

What is the role of thyroxine in the body?

This medication plays an important role in controlling body metabolism and regulates the functions of the heart and the digestive tract. It also keeps the bones strong, helps in development of the brain and controls muscle growth. Patients should consult their doctors ...

What is the most common cause of hypothyroidism?

The most cause of hypothyroidism is Hashimoto’s thyroiditis. Hashimoto’s thyroiditis is an a...

How is thyroxine dose determined?

The dosage of Thyroxine is generally determined by the doctor, who decides the dose depending on the age as well as weight of the individual. A patient’s present health condition and medical history is also kept in mind when determining the dose. Information given here is based on the salt content of the medicine.

When to take thyrox 100 mg?

The drug is meant to be taken orally, ideally in the morning just before breakfast. In case of a skipped dose, you can take 2 doses at the same time the next day. In case if an underactive thyroid, the hormone may be replaced with Thyrox 100Mcg Tablet.

Can you take a syringe with a high temperature?

Ans: No, taking higher than the recommended dose of this medication can lead to increased chances of side effects such as Irregular heartbeat, Flushing, High temperature, Restlessness, Sweating, Diarrhoea, Headache, Vomiting, Irregular periods, Tremor, Irregular heartbeat, Difficulty sleeping, and Muscle weakness.

Does Lybrate take responsibility for thyroxine?

Lybrate does not take responsibility for any aspect of medicines or treatments. If you have any doubts about your medication, we strongly recommend you to see a doctor immediately. Popular Questions & Answers. I want to as that is levithyroxine sodium and thyroxine sodium same medication.

What are the side effects of a syringe?

Side effects requiring immediate medical attention 1 Chest pain or discomfort 2 decreased urine output 3 difficult or labored breathing 4 difficulty with swallowing 5 dilated neck veins 6 extreme fatigue 7 fainting 8 fast, slow, irregular, pounding, or racing heartbeat or pulse 9 fever 10 heat intolerance 11 hives or welts, skin itching, rash, or redness 12 irregular breathing 13 irritability 14 menstrual changes 15 nausea 16 pain or discomfort in the arms, jaw, back, or neck 17 sweating 18 swelling of the eyes, face, lips, throat, or tongue 19 tightness in the chest 20 tremors

Can euthyroidism cause weight loss?

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.

Does levothyroxine cause side effects?

Along with its needed effects, levothyroxine (the active ingredient contained in Tirosint) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. Check with your doctor immediately if any of the following side effects occur while taking levothyroxine:

Does overtreatment with a syringe increase heart rate?

The clinical significance of these changes remains to be determined. Overtreatment with this drug may cause an increase in heart rate, cardiac wall thickness, and cardiac contractility and may precipitate angina or arrhythmias, particularly in patients with cardiovascular disease and in elderly patients.

Does levothyroxine go away?

Some side effects of levothyroxine may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine . Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

What are the side effects of Synthroid?

Serious side effects of Synthroid include. shortness of breath, tremors, weakness, skin or hair dryness, and. hair loss. Drug interactions of Synthroid include blood thinners because Synthroid may increase the effect of blood thinners. Initiation or discontinuation of therapy with Synthroid in diabetic patients may create a need for an increase ...

What is the drug that inhibits the conversion of levothyroxine to triiodothy

Other drugs: Amiodarone. 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.

What is the name of the synthetic thyroid hormone?

Synthroid (levothyroxine) is a synthetic (man-made) version of the principle thyroid hormone, thyroxine (T4) made and released by the thyroid gland used to treat low thyroid (hypothyroidism) and to suppress thyroid hormone release in the management of cancerous thyroid nodules and growth of goiters. Common side effects of Synthroid include chest ...

Why is thyroid important?

In the fetus and newborn, thyroid hormone is important for the growth and development of all tissues including bones and the brain. In adults, thyroid hormone helps to maintain brain function, utilization of food, and body temperature, among other effects. irregular menstrual cycles. hair loss.

Can sympathomimetics cause thyroid problems?

Sympathomimetics. Concurrent use of sympathomimetics and Synthroid may increase the effects of sympathomimetics or thyroid hormone. Thyroid hormones may increase the risk of coronary insufficiency when sympathomimetic agents are administered to patients with coronary artery disease.

Does thyroid medication affect metabolism?

Many drugs can exert effects on thyroid hormone pharmacokinetics and metabolism (e.g., absorption, synthesis, secretion, catabolism, protein binding, and target tissue response) and may alter the therapeutic response to Synthroid (see Tables 2-5 below).

How to report a drug problem to the FDA?

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088 . Professional side effects and drug interactions sections courtesy of the U.S. Food and Drug Administration.

How long does levothyroxine stay in your system?

You should be aware, though, that each dose of levothyroxine will stay in your system for about 4 weeks total (4). You won't experience symptoms of overdose for that long, however, but it may take you some time to find the correct dose because of this.

What is the best thyroid medicine?

Levothyroxine is the #1 most prescribed thyroid medication on the market. As you probably are already well aware, levothyroxine is prescribed to treat cases of LOW thyroid otherwise known as hypothyroidism. Levothyroxine works by providing your body with the thyroid hormone that it isn't able to create on its own.

Does levothyroxine help with bowel movement?

Thyroid hormone, and, therefore, levothyroxine, help to control the kinetics of your bowels. The kinetics of your bowel simply refers to how quickly your intestinal tract is moving. The more thyroid hormone you take the faster your bowels will move and the less time your "food" will stay in there.

Can levothyroxine make you sleepy?

As your dose of levothyroxine increases, it will become more and more difficult for you to fall asleep and have a restful night's sleep. When you are really amped up and you have the sort of nervous energy that I talked about previously, it will be hard for you to calm your body down to fall asleep at night.

Is levothyroxine high or low?

The higher your dose of levothyroxine the more amped up you will feel and the more prone to anxiety you will become. The exact opposite is true when your levothyroxine dose is not high enough. If your dose is too low then you will tend to feel depressed or suffer from depression .

Can levothyroxine cause hypothyroidism?

So MOST people taking levothyroxine end up with persistent symptoms of hypothyroidism despite taking the "right" medication for their body. Having said that, there are certainly some people who DO take too much levothyroxine and this article is for those people.

Is it dangerous to overdose on levothyroxine?

The first thing I want you to know is that being overdosed on levothyroxine is not nearly as common as not taking enough thyroid hormone. Because doctors know that taking too much thyroid hormone can be dangerous, they would much rather err on the side of giving you too little .

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For The Consumer

  • Applies to levothyroxine: oral capsule liquid filled, oral solution, oral tablet Other dosage forms: 1. injection powder for solution
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For Healthcare Professionals

  • Applies to levothyroxine: compounding powder, injectable powder for injection, intravenous powder for injection, intravenous solution, oral capsule, oral solution, oral tablet
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Frequently Asked Questions

Further Information

  • Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances. Some side effects may not be reported. You may report them to the FDA. Medical Disclaimer
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