Treatment FAQ

if radioactive hyperthyroid treatment us so safe why do i have to stay away from people afterward

by Mr. Alvis Lynch Sr. Published 2 years ago Updated 2 years ago

If you have radioactive iodine treatment, you do need to take some precautions. The iodine not absorbed by your thyroid is eliminated through urine, sweat and saliva, so you need to be careful around other people. For about 48 hours after treatment, you should sleep in a bed separate from others.

Although the treatments with 131-I are generally safe, RAI produces radiation so patients must do their best to avoid radiation exposure to others, particularly to pregnant women and young children. The amount of radiation exposure markedly decreases as the distance from the patient increases.

Full Answer

Can you get hypothyroidism after radioactive iodine treatment?

Nov 01, 2005 · To determine whether RAI is safe over the long term, these investigators conducted a population-based study of 2668 persons aged 40 years or older who had received this treatment for hyperthyroidism. 4 Although 487 deaths were predicted for this group, 554 of the RAI-treated patients died; thus, the risk of dying was 1.14 times greater than in controls …

Is radiation therapy for hyperthyroidism dangerous?

Radioactive iodine has been used as a treatment for thyroid disorders, most commonly hyperthyroidism, goitres and thyroid cancer since the 1940s. We have a range of general information to help you understand more about this treatment, how it is used and how safe it is. If you have any specific questions about your own treatment, or that of your family member or …

How far should I stay away from others after radioactive iodine treatment?

Nov 19, 2021 · In general, RAI is a safe and effective treatment for the thyroid disorders mentioned above. Hypothyroidism is a common side effect of RAI for hyperthyroidism and always seen after RAI for thyroid cancer. This is usually easily treated with thyroid hormone replacement (see Hypothyroidism brochure). Some studies suggest a slight increase in thyroid cancers may …

Does radioiodine affect quality of life after treatment for Graves’ hyperthyroidism?

So, yes, radiation can be dangerous when not carefully controlled, but that very fact is the reason why the treatment works. The aim of the treatment is to damage and kill the cells responsible for the hyperthyroidism. Radioactive iodine and some other radioisotopes used in Nuclear Medicine are produced during the production of nuclear energy.

Why do I have to stay away from people after radioactive iodine?

The radiation will pass out of your body through your urine within days. Until that time, you will give off radiation in your sweat, your saliva, your urine, and anything else that comes out of your body. It is important to avoid exposing other people to the radioactivity from your body.

What happens if you are exposed to someone with radioactive iodine?

If too much radioactive iodine enters your body, the radioactive iodine will destroy your thyroid gland so that the gland will stop making hormones. Too much radioactive iodine in your body can also cause thyroid nodules or cancer.

Why do you have to isolate with Rai?

Your body will give off radiation for some time after you get RAI therapy. Depending on the dose of radioiodine used and where you are being treated, you might need to be in the hospital for a few days after treatment, staying in a special isolation room to prevent others from being exposed to radiation.Mar 14, 2019

How long do you have to quarantine after radioactive iodine treatment?

In those first 3 days after therapy, you should stay a safe distance away from others (6 feet away, approximately). It's a good idea to avoid public places. For the first 3 days after receiving radioactive iodine, don't share anything—this includes utensils, bedding, and personal items.Aug 8, 2016

What are the long term side effects of radioactive iodine?

Possible long term side effects include:
  • Ability to have children (fertility) Some women may have irregular periods after radioactive iodine treatment. ...
  • Inflammation of the salivary glands (where spit is made) ...
  • Tiredness. ...
  • Dry or watery eyes. ...
  • Lower levels of blood cells. ...
  • Lung problems. ...
  • Second cancers.
May 24, 2021

Can radioactive iodine cause other cancers?

This new analysis concluded that radioactive iodine was associated with an increased risk for mortality from overall cancer, breast cancer, and non-breast solid cancers.Jan 18, 2022

How long does it take for radioactive iodine to leave your body?

The radioiodine from your treatment will temporarily remain in your body. Most of the radioiodine not taken up by your thyroid gland will be eliminated within the first (2) two days after treatment. Radioiodine leaves your body primarily by your urine. Very small amounts may leave in your saliva, sweat, or feces.

How can I protect my thyroid from radiation?

Potassium iodide (KI) is a salt that can help protect you from radioactive iodine. Your thyroid gland is the part of your body that's most sensitive to radioactive iodine. Potassium iodide can help block your thyroid from absorbing radioactive iodine if you are exposed to it.Mar 18, 2022

Can hyperthyroidism return after radioactive iodine?

Once hypothyroidism has been achieved, it is usually irreversible with the patient requiring lifelong thyroid replacement. Recurrence of hyperthyroidism after RAI therapy may be due to inadequate dosing or early Marine Lenhart syndrome.Sep 12, 2017

Can you refuse radioactive iodine treatment?

When patients refuse RAI therapy, the harm associated with no treatment (as in thyroid cancer) also must be weighed and communicated to the patients. In many cases of GD, for example, the use of antithyroid medications or surgical subtotal thyroidectomy may provide appropriate therapy without the use of RAI.

How successful is radioactive iodine treatment?

Conclusion: Radioactive iodine treatment is an effective modality for definitive treatment of hyperthyroidism with long-term cure approaching 80%.

Does radioactive iodine shorten your life?

Quality of life is worse at 6-10 years after radioactive iodine therapy of Graves' disease compared with treatment with antithyroid drugs or surgery. Quality of life is worse at 6-10 years after radioactive iodine therapy of Graves' disease compared with treatment with antithyroid drugs or surgery.

What to do if you have hyperthyroidism?

If you've been diagnosed with hyperthyroidism, the most important thing is to receive the necessary medical care. After you and your doctor have decided on a course of action, there are some things you can do that will help you cope with the condition and support your body during its healing process.

How to diagnose hyperthyroidism?

Diagnosis. Hyperthyroidism is diagnosed using: Medical history and physical exam. During the exam your doctor may try to detect a slight tremor in your fingers when they're extended, overactive reflexes, eye changes and warm, moist skin. Your doctor will also examine your thyroid gland as you swallow to see if it's enlarged, ...

Why is radioiodine high?

A high uptake of radioiodine indicates your thyroid gland is producing too much thyroxine. The most likely cause is either Graves' disease or hyperfunctioning thyroid nodules. If you have hyperthyroidism and your radioiodine uptake is low, this indicates that the thyroxine stored in the gland is leaking into the bloodstream, which may mean you have thyroiditis.

Why is TSH important?

The amount of TSH is important because it's the hormone that signals your thyroid gland to produce more thyroxine. These tests are particularly necessary for older adults, who may not have classic symptoms of hyperthyroidism.

What test can you take to check if you have hyperthyroidism?

If blood tests indicate hyperthyroidism, your doctor may recommend one of the following tests to help determine why your thyroid is overactive: Radioiodine uptake test. For this test, you take a small, oral dose of radioactive iodine (radioiodine) to see how much will collect in your thyroid gland.

How to test thyroid?

During this test, you'll have a radioactive isotope injected into the vein on the inside of your elbow or sometimes into a vein in your hand. You then lie on a table with your head stretched backward while a special camera produces an image of your thyroid gland on a computer screen. This test shows how iodine collects in your thyroid.

How long does it take for iodine to disappear?

Symptoms usually subside within several months. Excess radioactive iodine disappears from the body in weeks to months.

What is the I-131 thyroid?

THYROID TISSUE – I-131 is given to destroy overactive thyroid tissue (see Hyperthyroidism brochure) or to shrink thyroid glands that are functioning normally but are causing problems because of their size (see Goiter brochure ). Patients are asked to follow some radiation precautions after treatment in order to limit radiation exposure to others (see chart). I-131 may occasionally cause mild pain in the neck that can be treated with aspirin, ibuprofen or acetaminophen. The RAI treatment may take up to several months to have its effect. Frequently, the end result of RAI treatment of hyperthyroidism is hypothyroidism, which is treated by thyroid hormone replacement (see Hypothyroidism brochure ).

Why is iodine important for the thyroid gland?

Iodine is essential for proper function of the thyroid gland, which use s it to make the thyroid hormones. The thyroid is equipped with an active system or “pump” for moving iodine into its cells, where it is concentrated as iodide. The thyroid gland is the only tissue in the body that takes up and holds onto iodine.

What is the I-123 isotope used for?

I-123 is the usual isotope used to take pictures and determine the activity of the intact thyroid gland ( Thyroid Scan and Radioactive Iodine Uptake, RAIU ), since it is harmless to thyroid cells. No special radiation precautions are necessary after a thyroid scan or RAIU using I-123. I-131 can also be used to take pictures of the thyroid gland, ...

How does I-131 work?

This is performed after the remaining thyroid cells ( including any cancer cells) are stimulated by raising TSH levels by either withdrawing the thyroid hormone pills or by treating with recombinant human TSH. Patients are asked to follow some radiation precautions after treatment in order to limit radiation exposure to others ( see below ). Depending on state regulations, patients may have to stay isolated in the hospital for about 24 hours to avoid exposing other people to radiation, especially if there are young children living in the same home.

What is iodine used for?

Iodine, in the form of iodide, is made into two radioactive forms of iodine that are commonly used in patients with thyroid diseases: I-123 ( harmless to thyroid cells) and I-131 ( destroys thyroid cells ). The radiation emitted by each of these forms of iodine can be detected from outside the patient to gain information about thyroid function ...

Does RAI cause infertility?

Men who receive RAI treatment for thyroid cancer may have decreased sperm counts and temporary infertility for periods of roughly two years. Sperm banking is an option in a patient who is expected to need several doses of RAI for thyroid cancer.

Is 131-I radiation safe?

Although the treatments with 131-I are generally safe, RAI produces radiation so patients must do their best to avoid radiation exposure to others, particularly to pregnant women and young children. The amount of radiation exposure markedly decreases as the distance from the patient increases. Patients who need to travel in the days after I-131 RAI treatment are advised to carry a letter of explanation from their physician. This is because radiation detection devices used at airports or in federal buildings may pick up even very small radiation levels. Details should be discussed with a physician prior to, and at the time of, the RAI treatment.

How long do you have to stay in hospital after ablative thyroid?

Patients who have what is called an ablative dose (usually for treatment of thyroid cancer) are asked to stay in hospital for three days following the treatment. This is to reduce the doses to other members of the public.

Why is radioactive iodine used in thyroid cancer?

This way, when you take the capsule (or drink the liquid) it will all be taken up into the thyroid gland and the effect of the beta radiation will be mostly confined to the thyroid tissue, which is the target of the treatment. The point of the radio-iodine treatment is to destroy the thyroid tissue which is causing the over-production of thyroid hormones. This is especially important for patients with certain types of thyroid cancer who need to have all thyroid cells within their body destroyed in order to cure the cancer and to stop it from spreading. So, yes, radiation can be dangerous when not carefully controlled, but that very fact is the reason why the treatment works. The aim of the treatment is to damage and kill the cells responsible for the hyperthyroidism. Radioactive iodine and some other radioisotopes used in Nuclear Medicine are produced during the production of nuclear energy. They are a by-product or, if you like, a useful waste product. Every batch is rigorously tested to ensure its safety.

What is the purpose of radioactive iodine?

The aim of the treatment is to damage and kill the cells responsible for the hyperthyroidism. Radioactive iodine and some other radioisotopes used in Nuclear Medicine are produced during the production of nuclear energy. They are a by-product or, if you like, a useful waste product.

Why can't you get pregnant after radiotherapy?

Patients are advised not to become pregnant for 6 months following radio-iodine treatment. This is because the radiation that is used could potentially affect the DNA in human cells.

Where is I131 excreted?

I131 is excreted from the body in all bodily fluids, including urine and sweat, so it is best that the first few days (when the radiation present in the body is highest) are spent in isolation at the hospital where it matters less that things will become contaminated.

How many people will get cancer from radiation?

There is a tiny chance that the exposure to radiation can cause cancer approximately a 1 in 10000 chance. However, when put into context 1 in 3 people will naturally develop cancer at some point in their life. Doctors will always weigh up the pros and cons of treatment and this should all be explained to the patient.

Why is nuclear medicine monitored?

the way that we, in Nuclear Medicine, are monitored and regulated to ensure safety and high standards at all times.

What happens if you don't have thyroid?

If you don't have thyroid hormone at all then you risk the chance of coma and death.

What happens if your thyroid is destroyed?

Once your thyroid is destroyed, it will no longer work exactly as it used to.

Why do people get radioactive iodine?

Most people who get radioactive iodine treatment do so because they are considered to be hyperthyroid ( sometimes people get RAI for thyroid cancer (5) but most people get it for hyperthyroidism).

What is radioactive iodine used for?

Radioactive iodine is a procedure that is often used to treat hyperthyroidism.

How long can you live after iodine treatment?

You can expect to live a fairly normal life after radioactive iodine treatment but your life will probably not be exactly as it was before your procedure. For most people, this means that you can expect to live at 80-90% of your 'normal'.

How long does it take for a RAI to fade?

The good news is that this radioactivity does fade over a short period of time (usually 5 to 7 days) but the bad news is that you need to stay under certain precautions during this time.

What happens if you destroy your thyroid gland?

And, if you destroy your thyroid gland, it turns out that that may have consequences on your metabolism. Anectodally, you've probably already heard stories about people gaining weight after their procedure.

What is the most common cause of hyperthyroidism?

Hyperthyroidism may be treated with antithyroid meds (Methimazole, Propylthiouracil), radioactive iodine or surgery. Graves’ disease : the most common cause of hyperthyroidism in the United States. It is caused by antibodies that attack the ...

What is radioactive iodine used for?

Radioactive iodine: this plays a valuable role in diagnosing and treating thyroid problems since it is taken up only by the thyroid gland. I-131 is the destructive form used to destroy thyroid tissue in the treatment of thyroid cancer and with an overactive thyroid.

How old are patients after Graves disease?

Patients were assessed at an average of 8 years after the diagnosis of Graves’ disease. Patients in surgery group were generally younger (average age 35 years, compared to 43 years for the antithyroid drug group and 54 years for the radioactive iodine therapy group). More patients in radioactive iodine therapy group had other medical conditions that may affect quality of life (44%, compared to 29% in the antithyroid drug group and 33% in the surgery group).

What is a thypro?

Thyroid-Related Patient-Reported Outcome questionnaire (ThyPRO): a validated questionnaire in determining quality of life in patients with thyroid disorders

Is radioactive iodine therapy less desirable?

If these findings are confirmed in other studies in other countries, it would suggest that radioactive iodine therapy may be less desirable in the long term as compared to antithyroid drugs or surgery. — Sun Y. Lee, MD.

Is I-131 safe?

I-131 is NOT harmless.....obviously, because 'we' take it to KILL thyroid tissue.#N#Talk to MSK NYC if you want to find out more about staying in a hotel after I-131 therapy.#N#There was a recent-ish article posted interviewing (most likely) Dr. Tuttle about international patients flying in for I-131 and then having to stay at hotels.#N#Ingesting I-131 is always the issue...not setting off alarms. (unless you're talking about garbage, which is a whole other 'can of worms').#N#Don't fool yourself in thinking I-131 therapy is risk free to anyone.#N#You, as the I-131 patient, have the choice to make...and in the U.S. you are afforded the choice to reduce exposure 'on your honor'. There's no 'police' and I-131 is the LEAST of a hotel's problems. I'm sure most hotel employees have never even heard of thyroid cancer or RAI/I-131.#N#goosh golly, ....I-131 IS HARMFUL! that's why we take it. I-131 is destructive to thyroid cells, that's why it's called ablation.

Is RAI 131 water safe?

I was told RAI 131 is water soluable and short term contact is not dangerous. This is a hard decision to make no matter how you look at it.#N#Things to consider:#N#Apartments are laid out just like hotels so you are exposing your neighbor for several hours a night also.#N#Homes are sometimes laid out such that children and others may be lying within 8 feet of you everynight for several hours a night#N#Townhomes are laid out just like hotels and Apartments so once again you are exposing a neighbor for several hours each night.#N#Nothing is safe, don't for half a second think that any one is any better than the other. I personally think a hotel stay in a hotel where you can request one on the top floor with no neighbor is far safer than any home stay where you know for sure others will be. You can clean up after yourself and bring your own sheets, blankets and pillows! There are many hotels that have tons of rooms open every night you just have to find that one!#N#I personally think having RAI should mean a mandatory 48 hour hospital stay, but they are worried about exposing their employees and other hospital staff. So what is the right option?#N#This is a tough situation no matter what perspective you see it from! No answer is right and no answer is wrong. No matter where you are you are exposing someone whether at the hospital, at home or at the hotel.

How to treat hypothyroidism after radioactive iodine?

Hypothyroidism is most often treated through hormone replacement therapy —a safe and effective treatment option that involves taking hormone medications to restore healthy hormone levels. Most people who develop hypothyroidism after radioactive iodine treatment can expect to take some form of hormone medication every day for the rest of their lives. This may sound extreme at first, but this vital medication is essentially doing the job of a healthy thyroid gland; it’s absolutely critical to bodily health. And while you may not feel any side effects of the medication when it’s working, whether good or bad, most patients say they notice an immediate difference when they stop taking their medication. To feel well every day and avoid all the symptoms of hypothyroidism, this simple step usually feels like a no-brainer.

How long after RAI can you start thyroid hormone?

They may even preemptively schedule you to start thyroid hormone treatment within a few weeks of the RAI procedure, just to be safe.

What is the term for a thyroid gland that no longer produces enough hormones for the body to function at an optimal

Hypothyroidism occurs when your thyroid gland no longer produces enough hormones for the body to function at an optimal level. T4 and T3 hormones are used by every cell in the body’s many systems but are primarily involved in regulating metabolism.

How does the body convert T4 to T3?

The human body naturally converts T4 hormones into T3 through the process of monodeiodination. But some people struggle to process this conversion and may require T3 supplementation in order to feel their best. T3 medications are a possible treatment option for you if your body hasn’t responded to T4 treatment alone.

Can you take thyroid medication after radioactive iodine?

No matter which hormone medications you need to take in order to treat hypothyroidism after radioactive iodine treatment, the best route is to consult with a hormone health specialist and get expert counsel. Maintaining a stable dose of thyroid medication is a job any primary care physician would be able to take on.

Can you take thyroid medication after RAI?

However, it can take a little while for you and your doctor to find the appropriate dose for your thyroid medication. Too little, and your hypothyroidism symptoms, such as deep fatigue and hair loss, may compromise your quality of life. Too much, and you might experience the familiar racing heart and nervous energy that you needed RAI to resolve. It’s also possible for hypothyroidism to worsen over time, which is why ongoing monitoring is critical to ensuring the best outcomes. After years of taking one dose of hormones, you might need to increase to a higher dose.

Can you get hypothyroidism after iodine?

Treating Hypothyroidism After Radioactive Iodine Treatment Helps You Find Balance. For those who struggle with hyperthyroidism or thyroid cancer, radioactive iodine treatment (RAI) can be a life-changing treatment option. But despite the promise of RAI, there is often a downside: you are likely to develop transient or permanent hypothyroidism ...

Diagnosis

  • Hyperthyroidism is diagnosed using: 1. Medical history and physical exam.During the exam your doctor may try to detect a slight tremor in your fingers when they're extended, overactive reflexes, eye changes and warm, moist skin. Your doctor will also examine your thyroid gland as you swallow to see if it's enlarged, bumpy or tender and check your pulse to see if it's rapid or irregul…
See more on mayoclinic.org

Treatment

  • Several treatments for hyperthyroidism exist. The best approach for you depends on your age, physical condition, the underlying cause of the hyperthyroidism, personal preference and the severity of your disorder. Possible treatments include: 1. Radioactive iodine. Taken by mouth, radioactive iodine is absorbed by your thyroid gland, where it causes the gland to shrink. Sympto…
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Lifestyle and Home Remedies

  • Once you begin treatment, symptoms of hyperthyroidism should subside and you should start feeling much better. However, your doctor may recommend that you watch out for iodine in your diet because it can cause hyperthyroidism or make it worse. Kelp, dulse and others types of seaweed contain a lot of iodine. Cough syrup and multivitamins also may co...
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Coping and Support

  • If you've been diagnosed with hyperthyroidism, the most important thing is to receive the necessary medical care. After you and your doctor have decided on a course of action, there are some things you can do that will help you cope with the condition and support your body during its healing process. 1. Get regular exercise.Exercise in general will help you feel better and improve …
See more on mayoclinic.org

Preparing For Your Appointment

  • You'll likely start by seeing your primary care doctor. However, in some cases, you may be referred immediately to a doctor who specializes in the body's hormone-secreting glands (endocrinologist). If you have eye involvement, you may also be referred to an eye doctor (ophthalmologist). It's good to prepare for your appointment. Here's some information to help yo…
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