Treatment FAQ

how does radioactive thyroid treatment work

by Sienna Ullrich I Published 3 years ago Updated 2 years ago
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Radioactive iodine (I-131), an isotope of iodine that emits radiation, is used for medical purposes. When a small dose of I-131 is swallowed, it is absorbed into the bloodstream in the gastrointestinal (GI) tract. It is concentrated from the blood by the thyroid gland, where it begins destroying the gland's cells.

Can your thyroid start working again after radioactive iodine?

Once hypothyroidism has been achieved, it is usually irreversible with the patient requiring lifelong thyroid replacement. Early recurrences are reported in 20–54% of cases within 3–6 months, which can be due to inadequate RAI treatment or early Marine Lenhart syndrome.Sep 12, 2017

What are the side effects of radiation for thyroid?

Common side effects of external radiation for thyroid cancer can include:Severe tiredness (fatigue)Trouble swallowing.Dry mouth.Cough.Hoarseness.Loss of appetite.Low blood counts.Nausea.More items...

How effective is radioactive iodine treatment for thyroid cancer?

Results: The total effective rate of 131I therapy of the current study was 87.9%. The recurrence rate was 12.1%. Of the real 141 thyroid cancer patients, 114 thyroid cancer patients were female (80.15%), and 27 patients were male (19.85%).

How long do you have to be in isolation after radioactive iodine?

You are also required to self isolate for 7 days after your radioiodine treatment in order to minimise the risk of contracting COVID-19 whilst there is still a large amount of radioactivity in your body. A small proportion of people with COVID-19 may become very unwell and require admission to hospital.

Does thyroid removal shorten life expectancy?

We have also shown that treatment per se (thyroidectomy, high-dose radioactive iodine and thyroid hormone medication) is safe and does not shorten life expectancy. Nonetheless, it remains important to realise that patients with persistent disease have a median standardised survival time of only 60%, independent of age.

What happens to thyroid after radioactive iodine?

Radioactive iodine is taken up by the thyroid, and destroys the cells in the thyroid gland. This has the effect of reducing the amount of thyroxine made by the thyroid gland and may also reduce the size of the gland.Sep 11, 2019

Does radioactive iodine treatment 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.

Is thyroid cancer curable?

This gland produces hormones that regulate your metabolism (how your body uses energy). Thyroid hormones also help control your body temperature, blood pressure and heart rate. Thyroid cancer, a type of endocrine cancer, is generally highly treatable with an excellent cure rate.Aug 13, 2020

How will I feel after radioactive iodine?

A swollen or tender neck and feeling flushed Some people may have a feeling of tightness or swelling in their neck for a few days after treatment. This is more common if you still had a large part of your thyroid gland when you have radioactive iodine treatment. Some people also feel flushed.May 24, 2021

Can I use my cell phone after radioactive iodine?

You will have to stay in your room for at least 1 to 2 hours after your treatment. You can use your cell phone or watch TV to help pass the time. You won't be able to have visitors during this time. You may not have any side effects from the treatment right after you get it, but you may have side effects later.Aug 19, 2020

Can you go home after radioactive iodine treatment?

Remain in your home for the first four days. Do not hold young children or spend much time near a pregnant woman. Family members should stay about six feet or more from you. After the first two days, they may be closer for brief periods, such as a few minutes.Apr 30, 2009

Do you gain weight after radioactive iodine treatment?

They undergo treated with antithyroid drugs or with medication plus radioactive iodine treatment (RAI). Following treatment for hyperthyroidism, patients will observe a steady weight gain despite not changes in their eating or exercise.Jun 1, 2020

What is the treatment for thyroid cancer?

The most common types of thyroid cancer (papillary and follicular) can usually be treated with large doses of radioactive iodine. (The dosages of RAI are much higher than with hyperthyroidism treatment.) The therapy is usually given after removal of the thyroid gland to destroy any remaining thyroid tissue. A “tracer” dose of radioactive iodine can ...

How long does it take for iodine to flush out of the body?

Most patients need only one dose before their hyperthyroidism is resolved, which may take a few weeks to several months.

How does RAI work?

The thyroid is the most efficient organ at concentrating iodine. RAI treats hyperthyroidism by damaging or destroying thyroid cells through radiation. RAI is taken in an oral capsule form. You don’t need to be hospitalized unless the dose is very high, which is rarely needed.

What hormones are needed for nervousness?

The thyroid gland needs iodine to make these hormones. The thyroid is the most efficient organ at concentrating iodine.

What are the side effects of RAI?

Temporary side effects of RAI may include: 1 Neck tenderness and swelling. 2 Nausea. 3 Swollen salivary glands. 4 Loss of taste or taste change. 5 Dry mouth/insufficient salivary production. 6 Dry eyes. 7 Excessive tearing from the eyes.

Is radioactive thyroid medicine safe?

The term “radioactive” may sound frightening, but it is a safe, generally well-tolerated, and reliable treatment that targets thyroid cells so there is little exposure to the rest of your body’s cells . Cleveland Clinic is a non-profit academic medical center.

Can RAI cause hypothyroidism?

Permanent hypothy roidism (or underactive thyroid, when the thyroid does not produce enough hormones) is an expected side effect of RAI treatment for hyperthyroidism. Fortunately, hypothyroidism is much easier to treat than hyperthyroidism using hormone replacement therapy.

How long does it take for thyroid to stop taking up radioactive iodine?

If you have too much iodine in your diet, it can stop the thyroid cells from taking up the radioactive iodine. Continue to follow this diet for 24 hours after your treatment is completed, or as instructed by your doctor. Read the resource for more information.

What is the name of the service that takes up thyroid cells?

If you do, tell your doctor in Molecular Imaging and Therapy Service (MITS) before your treatment. This is sometimes called the Nuclear Medicine service. Radioactive iodine enters your bloodstream and is taken up by any thyroid- like cells. The radioactivity destroys the cancer cells.

How long after radioactive iodine therapy can you get pregnant?

Pregnancy and radioactive iodine therapy. Don’t get pregnant or get your partner pregnant for at least 6 months after getting radioactive iodine therapy, or as long as your doctor tells you to. Use birth control after treatment for at least 6 months after getting this treatment.

How to treat thyrotropin alfa?

Your treatment plan will follow these steps that will take place over a few days: 1. On the first day, you’ll have blood tests. After those tests, you’ll see your doctor and get a thyrotropin alfa (Thyrogen ®) injection (shot) to help you get ready for your treatment.

Where does radioactive iodine leave the body?

Most of the extra radioactive iodine will leave your body through your urine (pee), and smaller amounts will leave your body in your saliva (spit), sweat, and bowel movements (poop).

Why does my mouth dry out after iodine?

Dry mouth. This is also caused by irritation or damage to your salivary glands. Dry mouth may happen if you’re taking a higher dose of radioactive iodine. Dry mouth can happen right after treatment, or it may happen for several months to a year after treatment.

What is the phone number for radiation?

Contact Information. If you have any questions about radiation safety, call 212-639-7391 Monday through Friday from 9:00 am to 5:00 pm. If you have an emergency after 5:00 pm, during the weekend, or on holidays, call your endocrine doctor, or go to urgent care or the nearest emergency room.

How long does it take for thyroid to develop after radioactive iodine?

Over two-thirds of those who have radioactive iodine treatment will develop hypothyroidism (an underactive thyroid). This can occur anytime from one month after the treatment and is most common within the first 12 months after treatment but can occur later.

What is radioactive iodine?

Radioactive iodine is taken up by the thyroid, and destroys the cells in the thyroid gland. This has the effect of reducing the amount of thyroxine made by the thyroid gland and may also reduce the size of the gland.

What is levothyroxine used for?

Levothyroxine, which is thyroxine in tablet form, is used to replace the thyroxine that your thyroid gland is unable to produce. You may have got used to increased food intake without weight gain during the period of over-activity (increased metabolism).

How long does it take for iodine to work?

A common longer term side-effect of radioactive iodine treatment is an underactive thyroid gland (hypothyroidism), so it is very important to have regular thyroid blood tests starting from four to six weeks after the treatment to identify and treat this early, with levothyroxine.

Does iodine cause hair loss?

For some patients who are treated with radioactive iodine to reduce the size of a goitre, there is also a small risk that they may develop Graves’ disease. There is no risk that patients treated with radioactive iodine for an overactive or enlarged thyroid will lose their hair as a result of the treatment.

Can thyroid disease cause high thyroid hormone levels?

If the thyroid gland is very overactive, radioactive iodine can cause dangerously high levels of thyroid hormone and, very rarely, a condition known as thyroid crisis or storm.

Can you give radioactive iodine to a pregnant woman?

Radioactive iodine treatment is not given to: Pregnant women - radioiodine crosses the placenta and can affect the thyroid gland developing in the unborn baby. Breast-feeding women - the radioactive iodine passes via the milk to the baby’s thyroid gland. Anyone who is regularly vomiting or incontinent.

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 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 ...

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, ...

Is rai safe for X-rays?

RAI is safe to use in individuals who have had allergic reactions to seafood or X-ray contrast agents, since the reaction is to the compound containing io dine, not the iodine itself. RAI is given by mouth in pill or liquid form.

Can RAI cause thyroid cancer?

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 be seen after RAI treatment for hyperthyroidism.

How long does it take for a thyroid to heal?

Though you may only need a single dose, it may take up to six months before the medication fully destroys all or part of the thyroid. Fortunately, most patients experience reduced symptoms about a month after treatment. If your symptoms persist 6 months after treatment, you may need a second dose.

What is radioactive iodine ablation?

Your doctor may refer to it as radioactive iodine ablation (ablation is a term that refers to destruction or erosion). This article will focus on what you might expect when you are faced with the total elimination of your thyroid gland and its key functions. Graves disease, the most common form of hyperthyroidism, occurs most often in women, ...

What are the side effects of iodine?

Other side effects of radioactive iodine include: 1 Metallic taste in the mouth: This can last for a few weeks. 2 Nausea: This usually subsides one to two days after treatment. 3 Swollen salivary glands: This can last for a few weeks. It is caused by iodine absorbed by the salivary glands, though stimulating saliva flow a day after treatment (by sucking a lemon drop, for instance) is an effective remedy.

How long after iodine treatment can you drink water?

For the first 3 days after treatment, stay a safe distance away from others (6 feet is enough). Avoid public places and drink plenty of water (to encourage the removal of radioactive iodine through your urine). For the first three days, do not share items (utensils, bedding, towels, and personal items) with anyone else.

How long does iodine last?

Other side effects of radioactive iodine include: Metallic taste in the mouth: This can last for a few weeks. Nausea: This usually subsides one to two days after treatment. Swollen salivary glands: This can last for a few weeks.

What cells absorb iodine?

Thyroid cells are the main cells in the body that can absorb iodine, so there is very little radiation exposure to the rest of your body's cells. When the thyroid cells absorb the radiation, they are damaged or destroyed. Approximately 90% of patients need only one dose before they are cured of their hyperthyroidism.

Can radioactive iodine be used to destroy thyroid glands?

Radioiodine Ablation. Radioactive iodine therapy can destroy all or part of the thyroid gland, depending on need. While there may be instances when you won't need to have the entire thyroid gland rendered nonfunctional to alleviate your hyperthyroid symptoms, total destruction of the thyroid is most often necessary.

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.

How long does radioactive iodine affect sperm count?

Important to men is the fact that radioactive iodine can cause short-term reductions in sperm count for up to 2 years after your procedure (8). This may or may not be important to you based on your age, your gender, and whether or not fertility is something you are interested in but, again, it's worth knowing about.

How to avoid weight gain after RAI?

Your best bet to AVOID weight gain after RAI is to go into your procedure with a normal weight and to maintain a healthy lifestyle both before and after. Just realize that you will always be in a 'sensitive' category and you will be more likely to gain weight compared to people with their thyroid intact. #3.

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.

Can you survive after RAI?

You can obviously survive after RAI (otherwise they wouldn't do the procedure) but I want to teach you how to thrive afterward. And to key to getting there is to understand what happens to your body after this procedure and how it influences your thyroid function.

Can you take a thyroid pill every day?

There's no way for doctors to give you a pill once a day and for that pill to perform the exact same function that your thyroid gland does every minute of every day. Because of this, people may experience symptoms which may lead them to want to restore whatever thyroid function they can.

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