Euthyrox 25 - 200 microgram is indicated for: - Treatment of benign euthyroid goitre.- Prophylaxis of relapse after surgery for euthyroid goitre, depending on the post operative hormone status.- Substitution therapy in hypothyroidism.- Suppression therapy in thyroid cancer.Euthyrox 25 - 100 microgram is indicated for: - Concomitant supplementation during anti-thyroid drug treatment of hyperthyroidism.