I just got my prescription renewed for synthroid. I saw a medical alert that you should take no vitamins until the medication has been in your system for four hours. Have you heard about this?
Hi. Yes, this applies to iron supplements or vitamins containing iodine. I don't know which others. I take a women's vitamin about 2 hours after my synthroid, but it contains no iron or iodine. There is something about calcium supplements, I believe. Maybe to be on the safe side, you can take your vitamin with lunch.