Neo-Mercazole (Carbimazole)

Carbimazole, the active ingredient in Neo-Mercazole, is a thionamide presented as an oral tablet for oral use. It is used to treat hyperthyroidism, including Graves' disease, by reducing excess thyroid hormone production in adults and children. The medication works by inhibiting thyroid peroxidase, thereby decreasing the synthesis of thyroxine (T4) and triiodothyronine (T3).

GNH USA supplies Neo-Mercazole as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide. Our distribution network ensures consistent quality and regulatory compliance across EU and global markets.

Carbimazole is an antithyroid agent indicated for conditions characterized by excess thyroid hormone production, helping to restore normal metabolic balance.

- Graves' disease: reduces thyroid hormone levels to achieve euthyroidism. - Toxic multinodular goiter: controls hormone overproduction from multiple nodules. - Toxic adenoma: suppresses hormone output from a solitary hyperfunctioning nodule. - Thyroid storm: provides rapid control of severe, acute hyperthyroidism. - Pre‑operative preparation for thyroidectomy: lowers hormone levels before surgery.

Adverse reactions may occur with carbimazole therapy and should be monitored.

Common Side Effects: - Nausea or upset stomach. - Skin rash or pruritus. - Taste disturbance or loss of taste. - Arthralgia or muscle aches. - Mild headache.

Serious or Rare Side Effects: - Agranulocytosis: severe drop in white blood cells, increasing infection risk. - Hepatotoxicity: liver enzyme elevations or hepatitis. - Vasculitis: inflammation of blood vessels, presenting with skin lesions or systemic symptoms.

Carbimazole requires careful monitoring and specific safety measures.

- Thyroid function monitoring: check TSH and free hormone levels regularly to adjust dose. - White blood cell count: perform baseline and periodic CBC to detect agranulocytosis early. - Liver function: assess hepatic enzymes before initiating therapy and during treatment. - Pregnancy considerations: use only if benefit outweighs risk; discuss with a specialist. - Elderly dosing: start with lower dose and titrate cautiously due to altered metabolism. - Store at room temperature: keep in the original container, protect from moisture and direct sunlight.

Carbimazole can interact with several medicines, affecting efficacy or safety.

Major Interactions (Avoid): - Warfarin: carbimazole may potentiate anticoagulant effect, increasing INR. - Amiodarone: combined use can exacerbate thyroid dysfunction. - Lithium: may enhance hypothyroid effect, requiring closer monitoring.

Moderate Interactions (Monitor Closely): - Beta‑blockers: may mask symptoms of thyrotoxicosis, complicating assessment. - Antacids (aluminum or magnesium): can reduce carbimazole absorption; separate dosing by at least 2 hours. - Rifampicin: may increase hepatic metabolism of carbimazole, reducing its effectiveness.