Skip to Content


Active substance(s): POTASSIUM IODIDE

View full screen / Print PDF » Download PDF ⇩
Potassium Iodide 65 mg tablets
Potassium iodide
Read all of this leaflet carefully before you start taking this medicine because it contains
important information for you.
- Always take this medicine exactly as described in this leaflet or as your pharmacist has
told you.Keep this leaflet. You may need to read it again.
- Ask your pharmacist if you need more information or advice.
- If you get any side effects talk to your doctor or pharmacist. This includes any possible
side effects not listed in this leaflet.
What is in this leaflet:
1. What Potassium Iodide tablets are and what they are used for
2. What you need to know before you take Potassium Iodide tablets
3. How to take Potassium Iodide tablets
4. Possible side effects
5. How to store Potassium Iodide tablets
6. Contents of the pack and other information

Potassium iodide is used in cases of nuclear accidents or nuclear reactor accidents to
prevent the uptake of radioactive iodine by the thyroid.
In the event of nuclear reactor accidents, there may be an emission of radioactive iodine. In
case of contamination, the radioactive iodine is taken up by the thyroid. The uptake of
radioactive iodine by the thyroid is prevented by the intake of non-radioactive iodine (e.g. in
the form of potassium iodide) before or during the contamination.

Do not take Potassium Iodide tablets
• if you are allergic to potassium iodide or any of the other ingredients of this medicine
(listed in section 6).
• if you have an overactive thyroid producing too much of thyroid hormones
• if you have a certain disorder of your blood vessel walls (hypocomplementaemic
• if you have an autoimmune disease involving itching and blisters of your skin (dermatitis
herpetiformis van Dühring).
Warnings and precautions
Talk to your doctor or pharmacist before using Potassium Iodide tablets if you:

• have a malign tumor in your thyroid or if your doctor assumes that you have one.
• have a narrowing of your wind-pipe (causing respiratory problems). The use of Potassium
Iodide tablets may worsen this condition.
• are being treated or were treated in the past for a thyroid problem.
• have a specific problem with your thyroid called thyroid autonomy and are not being
treated for it.
• have problems with your kidneys.
• have problems or are being treated for problems with your adrenal glands.
• are suffering from dehydration or cramp due to extreme heat.
• are taking any of the medicines listed in section “Other medicines and Potassium Iodide
Babies until a few weeks of age should be taken to the doctor as soon as possible after
being given Potassium Iodide tablets so that their thyroid function can be closely monitored.
Ask your doctor for advice if one of the above mentioned circumstances applies to you.
Other medicines and Potassium Iodide tablets
Tell your doctor or pharmacist if you are taking, have recently taken or might take any other
Please remember that this information can also be applicable to medicines which you have
taken/used recently.
Tell your doctor if you are taking:
• medicines inhibiting the thyroid function; when taken concomitantly with Potassium
Iodide tablets you should be closely monitored by a doctor.
• captopril or enalapril; these medicines may cause an increased potassium level in your
• quinidine; the effect of quinidine on the heart is increased by Potassium Iodide tablets.
• potassium-sparing diuretics (“water tablets”) such as amiloride or triamterene; those
medicines may cause an increased potassium level in your blood.
The use of Potassium Iodide tablets may influence radioiodine therapy and the results of
thyroid tests.
Pregnancy and breast-feeding
If you are pregnant or breast-feeding, think you may be pregnant or are planning to have a
baby, ask your doctor or pharmacist for advice before taking this medicine.
Pregnant women may take a maximum of 2 doses (this is 2 tablets twice). If Potassium
Iodide tablets is taken in late pregnancy, it is recommended to check the thyroid function of
the newborn.
Breast-feeding women may take a maximum of 2 doses (this is 2 tablets twice).
Iodide is excreted into breast milk, but the amount is not enough for the complete protection
of the baby. Therefore, Potassium iodide has to be given to the baby as well.
(See section 3, “How to take Potassium Iodide tablets”).

Driving and using machines
Potassium iodide has no influence on the ability to drive or use machines.
Potassium Iodide tablets contain lactose
This medicine contains lactose (milk sugar). If you have been told by your doctor that you
have an intolerance to some sugars, contact your doctor before taking this medicine.
Iodine tablets may only be taken in cases of nuclear accidents and if announced by the
respective authority, e.g. via radio or television.
Do not take the tablets on your own account.
Always take this medicine exactly as described in this leaflet or as your doctor or pharmacist
have told you. Check with your doctor or pharmacist if you are not sure.
For best possible protection it is necessary to take the tablets as soon as possible (within two
hours) after the announcement that radioactive iodine has been released.
If the tablets are taken 4 to 6 hours after the exposure to radioactive iodine, protection is
approximately 50%. The intake is useless 12 hours after the exposure, because the thyroid
has already taken up radioactive iodine.
The tablets can be chewed or swallowed whole. For sucklings, the tablets can be pulverized
or dispersed in water, syrup or similar liquids. It may take up to 6 minutes until the tablets are
fully dispersed. Make sure that the tablets are fully dispersed before you give them to your
The recommended dose is:
Adults and children 12 years or older: 2 tablets
Children aged 3 to 12 years: 1 tablet
Children aged 1 month to 3 years: a half tablet
Newborns and babies younger than 1 month: a quarter tablet
Pregnant women (all ages): 2 tablets. With this dose your unborn child is protected as well.
Breast-feeding women (all ages): 2 tablets.
Pregnant and breast-feeding women should take two doses (this is 2 tablets twice) as a
maximum. Newborns must not be given more than a single dose. Children developing skin
reactions after the first intake must not receive further doses either.
The intake of iodine tablets is not recommended for persons above 40 years, because at this
age there is no increased risk for thyroid cancer caused by exposure to radioactive iodine.
The single intake of the above mentioned doses protects against the possible uptake of
radioactive iodine if inhaled when the radioactive cloud passes by.
If the release of radioactive iodine continues and thus also the exposure by inhalation, the
above mentioned doses should be taken on a daily basis as long as the release of
radioactive iodine continues.

If you take more Potassium Iodide tablets than you should
Taking more of Potassium Iodide tablets than described above does not increase the
protective effect. If you have taken too much of Potassium Iodide tablets, iodine poisoning
may occur with severe side effects such as respiratory and heart problems.
If you have taken too much of Potassium Iodide tablets, contact your doctor immediately.
Like all medicines, this medicine can cause side effects, although not everybody gets them.
Rare (may affect up to 1 in 1 000 people):
• Temporary skin rash.
Not known (frequency cannot be estimated from the available data):
• An overactive thyroid gland (characterised by weight loss, increased appetite,
intolerance to heat and increased sweating).
• An enlarged thyroid gland with or without the development of myxoedema (a
condition in which there is a thickening of the skin and body tissues, most notably the
• Hypersensitivity reactions such as swollen salivary glands, headache, wheezing or
coughing, and stomach upset may occur.
If you get any side effect talk to your doctor or pharmacist. This includes any side effects not
listed in this leaflet.
Keep this medicine out of the sight and reach of children.
Do not store above 25°C.
Store in the original package in order to protect from light and moisture.
Do not use this medicine after the expiry date which is stated on the blister and carton after
“EXP”. The expiry date refers to the last day of that month.
Do not throw away any medicines via waste water or household waste. Ask your pharmacist
how to throw away medicines you no longer use. These measures will help protect the
What Potassium Iodide tablets contain
• The active substance is potassium iodide. 1 tablet contains 65 mg potassium iodide,
equivalent to 50 mg iodine.
• The other ingredients are maize starch, lactose monohydrate, microcrystalline cellulose (E
460), basic butyl methacrylate copolymer, magnesium stearate (E 572).

What Potassium Iodide tablets look like and contents of the pack
The tablets are white to white-brown in colour, round, curved and have a cross-shaped
pressure-sensitive break line on the inner side and notches on the outer side.
The tablet can be divided into equal quarters.
Blister packs containing 2, 6, 10 or 20 tablets
Not all pack sizes may be marketed.
Marketing Authorisation Holder and Manufacturer
G.L. Pharma GmbH, Schlossplatz 1, 8502 Lannach, Austria
This medicinal product is authorised in the Member States of the European Economic
Area (EEA) under the following names:
The Netherlands:
Czech Republic:
Slovak Republic:
United Kingdom:

Kajodan 65 mg tabletten
калиев йодид G.L. Pharma 65 mg таблетки
ιωδιούχο κάλιο G.L. Pharma 65 mg δισκία
Jodid draselný G.L. Pharma 65 mg tablety
Potassium iodide G.L. Pharma
Kaliumjodidi G.L. Pharma 65 mg tablettia
Potassium iodide G.L. Pharma 65 mg tablets
Kalíumjoðíði G.L. Pharma 65 mg töflur
Potassium iodide G.L. Pharma 65 mg tabletes
Potassium iodide G.L. Pharma 65 mg tablets
Potassium iodide G.L. Pharma 65 mg tablets
Jodek potasu G.L. Pharma
Iodeto de potássio G.L. Pharma 65 mg comprimidos
Iodură de potasiu G.L. Pharma 65 mg comprimate
Kaliumjodid G.L. Pharma 65 mg tabletter
Jodid draselný G.L. Pharma 65 mg tablet
Kalijev jodid G.L. Pharma 65 mg tablete
Potassium iodide 65 mg tablets

This leaflet was last revised in May 2012 .

Expand view ⇕

Source: Medicines and Healthcare Products Regulatory Agency

Disclaimer: Every effort has been made to ensure that the information provided here is accurate, up-to-date and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. This information has been compiled for use by healthcare practitioners and consumers in the United States. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate that the drug or combination is safe, effective or appropriate for any given patient. If you have questions about the substances you are taking, check with your doctor, nurse or pharmacist.