Treatment FAQ

how quick does radioactive iodine treatment work

by Concepcion Kirlin Published 2 years ago Updated 2 years ago
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Although the radioactivity remains in the thyroid for some time, it is greatly diminished within a few days. The effect of this treatment on the thyroid gland usually takes between one and three months to develop. Maximum benefit occurs three to six months after treatment.

Full Answer

What are the long term side effects of radioactive iodine?

Long term side effects of radioactive iodine treatment vary depending on:

  • your age
  • other medical conditions
  • your dose of radioactive iodine

What to expect after radioactive 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'.

What are the side effects of radioactive iodine therapy?

Temporary side effects of RAI may include:

  • Neck tenderness and swelling.
  • Nausea.
  • Swollen salivary glands.
  • Loss of taste or taste change.
  • Dry mouth/insufficient salivary production.
  • Dry eyes.
  • Excessive tearing from the eyes.

What are the risks of radioactive iodine treatment?

  • Stay at least six feet away from other people, including members of the public, family members, and co-workers, for three to 11 days. ...
  • Sleep apart from adults by at least six feet (a separate bedroom is recommended) and avoid sexual activity.
  • Avoid sleeping in the same bed with a pregnant woman, infant, or child for a period of six to 23 days. ...

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How long does it take to feel better after radioactive iodine?

It usually gets better within 4 to 8 weeks. It can help to drink plenty of fluids after your treatment.

How effective is radioiodine therapy?

Overall, positive effect of RAI (definitive hypothyroidism or euthyroidism) was very high: 93.7% in TA, 81.1% in TMG and 87.1% in GD patients. Thyroid volume reduction was observed in all patients, but was higher in GD patients (mean reduction of 76%) and in TA patients (mean nodule reduction of 69%).

How long am I radioactive after radioactive iodine treatment?

Your doctor will give you a wallet card with information about your treatment. The card states that you received treatment in Nuclear Medicine and that you may give off small amounts of radiation for up to 3 months after your treatment.

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

Avoid personal contact for about 3 to 7 days after 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.

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.

Will I gain weight after radioactive iodine treatment?

Treatment of hyperthyroidism with RAI or anti-thyroid medications is associated with an increased risk of gaining weight and even developing obesity. This risk is slightly higher with RAI therapy compared to medications.

Does radioactive iodine shrink nodules?

Radioactive iodine. Doctors use radioactive iodine to treat hyperthyroidism. Taken as a capsule or in liquid form, radioactive iodine is absorbed by your thyroid gland. This causes the nodules to shrink and signs and symptoms of hyperthyroidism to subside, usually within two to three months.

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.

Is it safe to be around someone after radioactive iodine treatment?

Keep Your Distance Here are some ways to minimize radiation risks to other people (and pets) after you have had RAI treatment: Stay at least six feet away from other people, including members of the public, family members, and co-workers, for three to 11 days.

What can you eat after radioactive iodine?

You can eat the following foods because they contain very low levels of iodine:fruits and vegetables including potatoes.cooked green vegetables.meat.ordinary table salt and sea salt.fresh bread.rice and dries pasta.non dairy spreads such as Vitalite, Pure and non dairy Flora.olive oil, vegetable oils and nut oils.More items...

What are the long-term side effects of radioactive iodine?

NCI study finds long-term increased risk of cancer death following common treatment for hyperthyroidism. New study findings show an association between the dose of a common treatment for hyperthyroidism and risk of death from solid cancers.

Do you still have Graves disease after radioactive iodine treatment?

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.

Which is better thyroid surgery or radioactive iodine?

Surgery for hyperthyroidism was associated with a lower risk of all-cause and cardiovascular death as compared to radioactive iodine therapy during long-term follow-up, particularly in men.

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.

Can hyperthyroidism be cured?

Can hyperthyroidism be cured? Yes, there is a permanent treatment for hyperthyroidism. Removing your thyroid through surgery or destroying your thyroid through medication will cure hyperthyroidism.

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.

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 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.

How long after RAI can I breastfeed?

Pregnancy should be delayed at least six to 12 months after RAI treatment for thyroid cancer. Breast feeding should be stopped at least six weeks before RAI and should not be resumed. In the days immediately following your RAI therapy, be aware of these general precautions to prevent radioactive exposure to others.

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 after radiation therapy can you go home?

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. Some people may not need to be hospitalized. Once you are allowed to go home after treatment, you will be given instructions on how to protect others from radiation exposure and how long you need to take these precautions. These instructions may vary slightly by treatment center. Be sure you understand the instructions before you leave the hospital.

How long should I take thyrotropin before RAI?

Another way is to get an injection (shot) of thyrotropin (Thyrogen), which can make withholding thyroid hormone for a long period of time unnecessary. This drug is given daily for 2 days, followed by RAI on the 3 rd day. Most doctors also recommend that you follow a low iodine diet for 1 or 2 weeks before treatment.

What is the radiation used for thyroid cancer?

The radiation dose used here is much stronger than the one used in radioiodine scans, which are described in Tests for Thyroid Cancer. This treatment can be used to ablate (destroy) any thyroid tissue not removed by surgery or to treat some types of thyroid cancer that have spread to lymph nodes and other parts of the body.

How to treat RAI?

For RAI therapy to be most effective, you must have a high level of thyroid-stimulating hormone (TSH or thyrotropin) in the blood. This hormone is what makes thyroid tissue (and cancer cells) take up radioactive iodine. If your thyroid has been removed, there are a couple of ways to raise TSH levels before being treated with RAI: 1 One way is to stop taking thyroid hormone pills for several weeks. This causes very low thyroid hormone levels (hypothyroidism), which makes the pituitary gland to release more TSH. This intentional hypothyroidism is temporary, but it often causes symptoms like tiredness, depression, weight gain, constipation, muscle aches, and reduced concentration. 2 Another way is to get an injection (shot) of thyrotropin (Thyrogen), which can make withholding thyroid hormone for a long period of time unnecessary. This drug is given daily for 2 days, followed by RAI on the 3 rd day.

Can you use rai for thyroid cancer?

Discuss your risks and benefits of RAI therapy with your doctor. Radioactive iodine therapy cannot be used to treat anaplastic (undifferentiated) and medullary thyroid carcinomas because these types of cancer do not take up iodine.

Can radiation cause irregular periods?

Radioactive iodine may also affect a woman’ s ovaries, and some women may have irregular periods for up to a year after treatment.

Does radioactive iodine help with thyroid cancer?

Radioactive iodine therapy helps people live longer if they have papillary or follicular thyroid cancer (differentiated thyroid cancer) that has spread to the neck or other body parts, and it is now standard practice in such cases. But the benefits of RAI therapy are less clear for people with small cancers of the thyroid gland ...

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.

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.

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 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).

How long before breast cancer treatment can you pump milk?

To prevent having radioactive iodine collect in your breast after your treatment, you’ll need to stop breastfeeding or pumping breast milk at least 6 to 12 weeks before your treatment.

How long does it take for thyroid pain to go away?

This is temporary and usually goes away within 8 weeks after your treatment. Try foods with different flavors to make sure you get the nutrition you need. Discomfort in your neck. This can happen during the first 2 to 3 weeks after your treatment, but it depends on the amount of thyroid tissue still in your neck.

What happens when you get radioactive iodine?

But doctors have harnessed that power. When someone gets a small dose of radioactive iodine, scanners can pick it up, and it can help reveal certain illnesses. Larger doses can attack thyroid cancer, prostate cancer, and other diseases.

What is radioactive iodine used for?

Eye Cancer. Radioactive iodine also treats a type of eye cancer called ocular melanoma or intraocular melanoma. This treatment calls for pellets inside a tiny disk. In the operating room, the medical team puts the disk next to your eye. It stays there several days, then the team removes it.

How long does it take to get a radioactive disk out?

The operation to insert the disk lasts about 2 hours. Taking it out usually needs less than an hour. It may take 3 to 6 months for the radiation to have its full effect on the cancer. Cervical and Uterine Cancer. If you’re a woman with cervical or uterine cancer, radioactive iodine may be a treatment option.

What is the thyroid gland?

The thyroid, a gland in the neck, uses it to make a hormone that guides some of the body’s essential functions, such as growth and physical development. Doctors use a different form of it: radioactive iodine. A substance that’s radioactive gives off a form of energy so intense that it’s capable of harming the body.

How long does iodine stay in the uterus?

It will probably have to stay there for 2 or 3 days.

What are the side effects of brachytherapy?

Side effects may include discomfort in the pelvic area, constipation (trouble pooping), and a burning sensation when you pee. Other forms of brachytherapy, as the treatment is called, include high-dose rate, which is done in a doctor's clinic over time. Share on Facebook Share on Twitter Share on Pinterest Email Print.

Can radiation cause diarrhea?

The radiation may go beyond your body, so you might have to stay away from children and pregnant women for a while. Side effects can include diarrhea (watery bowel movements) and the need to pee often. Radioactive iodine also treats a type of eye cancer called ocular melanoma or intraocular melanoma.

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 ...

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, ...

What is the purpose of I-131?

THYROID CANCER – Large doses of I-131 are used to destroy thyroid cancer cells (see Thyroid Cancer brochure ). 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.

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.

When can you stop breast feeding after I-131?

This protects the baby who would otherwise receive radioactive milk and the mother’s breasts which concentrate RAI. Breastfeeding must be stopped at least 6 weeks before administration of I-131 treatment and should not be restarted after administration of RAI, but can be safely done after future pregnancies.

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 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 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 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.

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.

How long does radioiodine stay in your system?

Radioiodine stays in your body for only a short time. Most of the radioiodine that does not go to thyroid tissue will be eliminated from your body during the first few days after treatment. Radioiodine leaves your body primarily through your urine, but very small amounts can be found in your saliva, sweat and bowel movements.

What is radioiodine used for?

What is radioiodine? Radioiodine (sodium I-131) is a form of radiation therapy that has been used for many years to treat thyroid conditions. It is safe and effective but requires you to observe certain precautions to decrease the small amount of radiation that other people may receive from your body and bodily fluids.

How long should you wait to breastfeed after radioiodine?

You must stop breastfeeding before you can be treated with radioiodine. If possible, you should stop breastfeeding for 6 weeks prior to treatment. You should not resume breastfeeding after treatment for your current child, but you may safely breastfeed babies you may have in the future.

How can radiation exposure be reduced?

Radiation exposure to other people can be reduced by keeping a reasonable distance between yourself and others and keeping the time you are close to others to a minimum. Your doctor should review the following instructions with you and answer all of your questions.

Why is radio iodine so effective?

One of the reasons that radio-iodine treatment is so effective is because the thyroid readily takes up iodine, which is used in thyroid hormone production. To ensure that the treatment is maximised you will be asked to avoid any foods and medicines ...

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.

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.

How long does it take to stop taking anti-thyroid medication?

This is usually prescribed in the beginning, for all patients, and approximately half of all patients are successfully treated with this method and can cease taking the medication after six months.

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.

What is the property of beta radiation?

Beta radiation, is much smaller and higher energy and so can pass a short distance through the human body before depositing its energy into a cell. This then causes cell death and this is the property that has been harnessed in order to make the radio-iodine treatment possible.

What is radioactive iodine?

Radioactive iodine ablation therapy is a reliable procedure for treating hyperthyroidism patients. To understand what radioactive iodine treatment is and how it works, read on. In the human body, thyroid is the only organ that has ability to absorb iodine.

How does iodine get out of the body?

After radioactive iodine ablation of the thyroid is over, the advocated iodine is expelled from body via urination. One should strictly follow the directions suggested by the concerned doctor for getting prompt results, and also, for minimizing the risks associated with radiation therapy.

Why is iodine used in thyroid medicine?

In fact, iodine is crucial for normal production of the thyroid hormones. Taking these into consideration, radioactive iodine therapy is purported to deal with ailments related to the thyroid gland. In the United States, radioactive iodine ablation of the thyroid is the most commonly proceeded therapeutic method for hyperthyroidism.

How long does it take for hyperthyroidism to go away?

Most likely, the symptoms of hyperthyroidism will disappear gradually after about 2 weeks of the treatment session. Coming to the working of radioactive iodine therapy, the delivered RAI is quickly assimilated by the digestive parts (stomach and intestine).

Is radioactive iodine safe for thyroid cancer?

In addition to hyperthyroidism, radioactive iodine treatment for thyroid cancer is found to be equally effective. In general, a patient diagnosed with thyroid cancer receives two treatment options, radioactive ablation and surgical procedure. The former aids in killing cancerous cells right in the thyroid glands and remaining areas of the body.

Can radioactive iodine cause hypothyroidism?

In case of high intake of radioiodine, there are chances that the thyroid gland becomes underactive, resulting in hypothyroidism symptoms. For such a case, thyroid hormone pills are recommended. Overall, the effectiveness of radioactive iodine treatment is highly impressive, and its side effects occur in rare cases.

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