Last Updated 13 Jun 2009
Carbimazole (Car-bim-az-ol) is a medicine which is used in reducing thyroid function.
The information in this Medicine Guide for Carbimazole varies according to the condition being treated and the particular preparation used.
There are 2 preparations of Carbimazole available. If Carbimazole 20mg tablets is not the preparation you are looking for, please select from the drop down list below.
Select your preparation (type) of Carbimazole
Carbimazole is usually started off at a high dose until the thyroid function returns to a normal level. The dose of Carbimazole is then reduced to keep the thyroid gland functioning at this normal level. Treatment is usually needed for between six and eighteen months. In some instances, Carbimazole is given at a dose that completely blocks the gland's production of thyroid hormone. When Carbimazole is used in this way, thyroid hormone tablets need to be taken to replace the production of thyroid hormone that Carbimazole is blocking.
In people with hyperthyroidism who are having surgery to remove all or part of the thyroid gland, Carbimazole may be used before surgery to lower the levels of thyroid hormones. Carbimazole may also be used in people who are having radio-active iodine treatment for their hyperthyroidism. In these cases, Carbimazole is usually only given before the radio-active iodine treatment.
Do not share your medicine with other people. It may not be suitable for them and may harm them.
The pharmacy label on your medicine tells you how much medicine you should take. It also tells you how often to take your medicine. This is the dose that you and your prescriber have agreed you should take. You should not change the dose of your medicine unless you are told to do so by your prescriber.
Some medicines work best if they are taken at a specific time of day. Getting the most benefit from your medicine can also be affected by what you eat, when you eat and the times at which you take other medicines.
Specific information on when to take Carbimazole can be found in the Patient Information Leaflet that comes with this medicine or on the medicine label. You can also ask your doctor or pharmacist for information about when to take your medicine.
Some medicines have specific instructions about how to take them. This is because they work better when taken correctly. These instructions can include getting the right dose and special instructions for preparing the medicine.
Specific information on how to take Carbimazole can be found in the Patient Information Leaflet that comes with this medicine or on the medicine label. Alternatively, you can request information about how to take your medicine from your doctor or pharmacist.
If you are having problems taking this form of Carbimazole, you should talk to your prescriber or pharmacist. They may be able to give you advice on other ways to take your medicine or other preparations that are easier for you to take.
Taking extra doses of some medicines can be harmful. In some cases even one extra dose can cause you problems. If you take extra doses of your medicine, you must get medical advice immediately. You may need a test to assess the effect of taking extra doses. This is because the effects of taking too much medicine are very complex and it is therefore essential that you seek medical advice.
The instructions on how you should keep your medicine are on the pharmacy label. It is a good idea to keep your medicine in the original container. This will help to keep your medicine in the best condition and also allow you to check the instructions. Do not take the medicine if the packaging appears to have been tampered with or if the medicine shows any signs of damage. Make sure that the medicine is out of the sight and reach of children.
Specific information on how to look after Carbimazole can be found in the Patient Information Leaflet that comes with this medicine or on the medicine label. Alternatively, you can request information about how to look after your medicine from your doctor or pharmacist.
Carbimazole is not suitable for everyone and some people should never use it. Other people should only use it with special care. It is important that the person prescribing this medicine knows your full medical history.
Over time it is possible that Carbimazole can become unsuitable for some people, or they may become unsuitable for it. If at any time it appears that Carbimazole has become unsuitable, it is important that the prescriber is contacted immediately.
Once a medicine has been licensed, information on the medicine's effects, both intended and unintended, is continuously recorded and updated.
Some side-effects may be serious while others may only be a mild inconvenience.
Everyone's reaction to a medicine is different. It is difficult to predict which side-effects you will have from taking a particular medicine, or whether you will have any side-effects at all. The important thing is to tell your prescriber or pharmacist if you are having problems with your medicine.
If you feel unwell or if you have concerns about a side-effect, you will need to seek advice. If you feel very ill, get medical help straight away. Contact your prescriber, pharmacist, nurse or call 111.
Medicines can interact with complementary preparations and vitamins. In general, there is not much information available about interactions between medicines and complementary preparations or vitamins.
Your prescriber can advise whether it is appropriate for you to take combinations that are known to interact. They can also discuss with you the possible effect that the complementary preparations and vitamins may have on your condition.
When taking any medicine you should be aware that it might interfere with your ability to drive or operate machinery safely.
Like all medicines Carbimazole can cause side effects. You should see how this medicine affects you and then judge if you are safe to drive or operate machinery. If you are in any doubt, talk to your prescriber.
Most medicines, in some way, can affect the development of a baby in the womb. The effect on the baby differs between medicines and also depends on the stage of pregnancy that you have reached when you take the medicine.
In the case of Carbimazole:
You need to discuss your specific circumstances with your doctor to weigh up the overall risks and benefits of taking this medicine. You and your doctor can make a decision about whether you are going to take this medicine during pregnancy.
If the decision is that you should not have Carbimazole, then you should discuss whether there is an alternative medicine that you could take during pregnancy.
Certain medicines can pass into breast milk and may reach your baby through breast-feeding.
In the case of Carbimazole:
Before you have your baby you should discuss breast-feeding with your doctor or midwife. They will help you decide what is best for you and your baby based on the benefits and risks associated with this medicine. If you wish to breast-feed you should discuss with your prescriber whether there are any other medicines you could take which would also allow you to breast-feed. You should not stop this medicine without taking advice from your doctor.
Medicines contain active ingredients. They may also contain other, additional ingredients that help ensure the stability, safety and effectiveness of the medicine. They are also added to improve the medicine's taste and appearance and to make it easier to take. Some may be used to prolong the life of the medicine.
This medicine contains carbimazole.
We are unable to list all of the ingredients for your medicine here. For a full list, you should refer to the patient information leaflet that comes with this medicine. You should check that you are able to take the ingredients of your medicine, especially if you have any allergies. You should also check whether any of these ingredients are known to have side-effects.
If you are not able to take any of the ingredients in your medicine, talk to your prescriber or pharmacist to see if they can suggest an alternative medicine. If you have reacted badly to Carbimazole before, do not take Carbimazole. Talk to your prescriber, pharmacist or nurse as soon as possible.
Carbimazole, Version 3, last updated 13 Jun 2009