In most cases, you will take thyroid replacement medication every day as your doctor prescribed. When you first start taking Synthroid, it’s very important for your doctor to monitor you closely. He or she will usually test your TSH levels every 6 to 8 weeks to make sure you’re on the right dose. Finding the right Synthroid dose for you may take some time. Keep in mind that everyone is unique.
During the first months of treatment, the doctor will work with you to find the right dose to get your TSH levels in range. The doctor will check how you’re doing on your prescribed Synthroid dose and ask you if you’re still experiencing any symptoms. Since each person is unique, some people may need a low dose of Synthroid to help replace the amount of thyroid hormone that’s missing. Others may need a higher dose.