[header] How to prepare for a thyroid scan [title] Find out what kind of scan you're getting. [step] Before your scan, you should speak with your physician to see if you need to discontinue taking any of your medications or vitamins. There are some that can interfere with the results, so it's important to discontinue their use. 
[substeps] These medications might include anti-thyroid medications and thyroid hormones. As these medications are used to treat your thyroid, they could affect the results of your scan.