###Human: Current dose of Synthyroid is 150 mg. What is the recommended dose to get normal thyroid level? ###Assistant: Hello. It is better to increase the dose by 25 mcg, i.e. 175 mcg if she was using 150 mcg till date escalating the dose or thyroid medication will be like 25 to 50 mcg at a time. Not double the dose causes severe sickness. As you mentioned, she was Synthroid (Levothyroxine). It is better to continue the medication to maintain a normal thyroid level for a long time. After using this medication 175 mcg, it is better to repeat the thyroid profile after six weeks to check for that thyroid level.