Medicines & Supplements A to Z > Carbimazole


Last updated on 13/07/2021.

Overview   |   Dosage   |    Side Effects   |   Precautions  |   Tips  |   Where To Buy  

GENERIC NAME: Carbimazole



DRUG CLASS: Endocrine drugs

SUB CLASS: Thioamides

USED FOR: Hyperthyroidism

– 5mg (tablets)

What is Carbimazole for?

Carbimazole is a type of thioamide antithyroid agent. It works by reducing the level of thyroid hormone produced and secreted to treat hyperthyroidism.

How to use it?

Carbimazole is taken orally as tablets. 

Initial dose: 10-15 mg three times daily OR 15 mg twice daily, for 4-6 weeks. Then, 10 mg twice daily for 8-10 weeks.
Maintenance dose: 5-15 mg once daily.

What are the side effects of Carbimazole?

Common side effects of Carbimazole include headache, fever, skin rash, nausea, vomiting, and arthralgia.

Who should not take Carbimazole?

– People who are allergic to Carbimazole or any component of the formulation
– Patients with severe liver impairment, or serious pre-existing hematological conditions
– Patients with a history of acute pancreatitis following Carbimazole or Methimazole treatment

Pharmacist Tips:

– Do not stop taking the medication suddenly.
– Use effective contraceptives measures during treatment to prevent pregnancy. 

Common dosing schedule:
Carbimazole can be taken with or without food.

This schedule is for reference only, adjustments may be made according to individual needs.

Some common medications Carbimazole may interact with:
– Beta-blockers, e.g. Propranolol, Metoprolol

Please notify your doctor or pharmacist if you are taking the above medication, dosage adjustments might be needed.

Where to buy Carbimazole in Hong Kong?

In Hong Kong, Carbimazole is a prescription only medicine, and requires a prescription from a doctor to be purchased in a pharmacy. It can also be obtained from doctors. To find a pharmacy near you, refer to the list of pharmacies (“Authorized Sellers of Poisons”) from the Hong Kong Department of Health.

For more information about drug names and ingredients, you can visit Hong Kong’s Drug Office at

Need more information?

For detailed information about the use of Carbimazole in children, pregnancy and breastfeeding, and for questions about drug interactions, please check with your pharmacist or doctor.

Disclaimer: our goal is to provide you with the most relevant drug information and common dosage for Hong Kong. This information does not constitute medical advice. For specific treatment recommendations and advice, always discuss with your doctor or pharmacist, and follow the instructions included with your specific medicine.