Actalin is a thyroid supplement that uses iodine and other nutrients to restore your thyroid health. You are suffering from hypothyroidism. Hypothyroidism is due to deficiency of secretion of thyroid hormone from thyroid gland. The most common cause of hypothyroidism is autoimmune thyroiditis in which there is a chronic inflammation of thyroid gland. Levothyroxine is the treatment of choice for hypothyroidism. You need to take levothyroxine for life-long. Any interruption in treatment will cause symptoms of hypothyroidism. Any type of thyroid supplement other than levothyroxine is not needed in hypothyroidism. Actalin is a thyroid supplement that uses a formula containing iodine, vitamins and minerals. You do not need these supplements. Using these supplement is a total wastage of money. Advice 1. Continue levothyroxine as suggested by your doctor 2. Do not use Actalin 3. Monitor you thyroid status by measuring serum TSH annually once you are on a stable dose of levothyroxine Thanks