Leaflet THYROZOL 5mg film-coated tablets

Product code:
W54547004
Quantity:
100
Indicated for:
hyperthyroidism
Route of administration:
oral
Substance:
thiamazole (antithyroid agent)
ATC
H03BB02 — Systemic hormonal preparations, excluding sex hormones and insulins | Antithyroid preparations | Sulfur-containing imidazole derivatives
Thiamazole, also known as methimazole, is a medication used to treat hyperthyroidism, a condition in which the thyroid gland produces excessive amounts of thyroid hormones. It works by inhibiting the synthesis of thyroid hormones, blocking the enzyme thyroid peroxidase, which is essential for the production of thyroxine (T4) and triiodothyronine (T3).

Thiamazole is commonly used in the treatment of Graves' disease, toxic diffuse goiter, and prior to thyroid surgery or radioactive iodine therapy to control thyroid hormone levels. The medication is taken orally, usually once or twice daily, depending on the severity of the condition.

Common side effects include skin rashes, itching, nausea, and joint pain. In rare cases, it can cause agranulocytosis (a severe drop in white blood cells), hepatotoxicity, or pancreatitis. It is contraindicated during the first trimester of pregnancy, as it may affect fetal development, but it can be used with caution in later trimesters. Regular monitoring of thyroid function and blood counts is essential during treatment.

General data about THYROZOL 5mg

Substance:
thiamazole
Date of latest medicines list:
01-06-2026
Product code:
W54547004
Concentration:
5mg
Pharmaceutical form:
film-coated tablets
Quantity:
100
Product type:
Original
Price:
41.17 RON
Prescription status:
P-6L — Medicines dispensed with a medical prescription that is not retained by the pharmacy and may be renewed; the prescription may be used for 6 months from the date of issue.

Marketing authorisation

Manufacturer:
MERCK KGAA - GERMANIA
Holder:
MERCK ROMANIA SRL - ROMANIA
Number:
4337/2012/04
Shelf life:
4 years

Pharmaceutical forms available for thiamazole

Concentrations available for thiamazole

  • 10mg
  • 20mg
  • 5mg