PRODUCT CLASSIFICATION
Antithyroid Hormones
ACNE
None
WATER RETENTION
None
HBR
None
HEPATOTOXICITY
None
AROMATIZATION
None
MANUFACTURER
Abdi Ibrahim
WAREHOUSE
International Warehouse 2
ACTIVE INGREDIENT
Methimazole
Methimazole is a trusted medication designed to effectively manage hyperthyroidism, a condition marked by the overproduction of thyroid hormones by the thyroid gland. This medication is often prescribed prior to thyroid surgery to lower hormone levels and minimize complications associated with thyroid manipulation. Additionally, methimazole is utilized in veterinary medicine to treat hyperthyroidism in cats.
How It Works:
Methimazole operates by inhibiting the enzyme thyroperoxidase, which is essential in the production of thyroid hormones. This enzyme facilitates the conversion of iodide ions (I-) into iodine (I0), a critical step for incorporating iodine into tyrosine residues on thyroglobulin, the precursor to the hormones triiodothyronine (T3) and thyroxine (T4). Notably, methimazole does not affect the sodium-dependent iodide transporter on the basolateral membranes of follicular cells, which would require competitive inhibitors like perchlorate and thiocyanate. It targets the site of CXCL10.
Potential Side Effects:
While using methimazole, it is important to monitor for symptoms such as fever or sore throat, which may signal the onset of agranulocytosis, a rare but serious side effect that can lead to a decrease in white blood cell count, especially neutropenia (a deficiency of neutrophils). A complete blood count (CBC) with differential is recommended to confirm this condition, at which point discontinuation of the drug is advised. The use of recombinant human granulocyte colony-stimulating factor (rhG-CSF) may assist in recovery.
Other possible side effects include:
- Skin rash
- Itching
- Unusual hair loss
- Nausea
- Vomiting
- Altered taste sensation
- Abnormal sensations (tingling, prickling, burning, tightness, and pulling)
- Swelling
- Joint and muscle pain
- Drowsiness
- Dizziness
- Decreased white blood cell count
- Reduced platelet count
- Aplasia cutis congenita (when exposed prenatally)
Individuals who may be at risk of experiencing adverse effects include those who:
- Take anticoagulants (such as warfarin), diabetes medications, digoxin, theophylline, and certain vitamins.
- Have a history of blood disorders (like leukopenia or thrombocytopenia) or liver diseases (such as hepatitis or jaundice).
- Are pregnant, planning to become pregnant, or breastfeeding. In these cases, propylthiouracil is often recommended as an alternative anti-thyroid medication. If pregnancy occurs while using methimazole, transitioning to propylthiouracil may be advised. While initial studies suggested potential risks to the fetus from methimazole, recent research indicates that risks may not be significant.
- Are preparing for surgical procedures, including dental surgeries.