Which vitamins interact with Levoxyl?
• A: Your question concerns which vitamins are a problem when taking Levoxyl [levothyroxine](http://www.everydayhealth.com/drugs/levoxyl). Levoxyl works best when taken on an empty stomach, at least one hour before or two hours after meals. This helps to increase the amount of drug that gets into the body and allows it to work as well as possible. In addition, thyroid supplements should be taken at the same time every day. Many people find this is easiest before breakfast. Levoxyl does interact with minerals such as iron, calcium, and magnesium, which lower the activity of thyroid medicine. If you take iron-containing products such as multivitamins with iron, make sure you do so at least two hours before or after you take your thyroid medication.
