About carbimazol e
Antithyroid thionamide medicine
Used for
- Treats overactive thyroid (hyperthyroidism), including Graves’ disease.
- Helps control thyroid levels before surgery or radioactive iodine treatment.
Usual adult dose
Often 15–40 mg daily initially, adjusted to thyroid tests; maintenance is usually 5–15 mg daily.
Usual dose in children
Used under specialist supervision; an initial dose is often 0.5–0.7 mg/kg daily, adjusted to response.
Common side effects
- Rash, itching, or joint pain
- Nausea or stomach upset
- Reduced white blood cells, rarely causing serious infection
- Rare liver injury or pancreatitis
Important warnings
- Fever, sore throat, mouth ulcers, or severe tiredness may signal dangerously low white blood cells.
- Seek urgent assessment for jaundice, dark urine, or severe abdominal pain.
- Tell clinicians about treatment before surgery; thyroid tests and blood tests may be needed.
- Do not stop or change treatment without medical supervision.
Pregnancy
Can harm the unborn baby, especially early in pregnancy; use requires specialist assessment and careful dose planning.
Breastfeeding
Usually compatible at low doses with medical supervision; monitor the infant’s growth and thyroid function.
Interactions
- Warfarin effects may change as thyroid levels improve.
- Theophylline, digoxin, and some beta blockers may need dose review as thyroid function changes.
- Other medicines affecting blood cells can increase concern about low white blood cells.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.