Drugs that interact with thyroid medications

Hypothyroidism is usually treated with a daily dose of synthetic T4 (levothyroxine sodium) in pill form. Once the right dose is established, your TSH will be checked every six months or so.

Taking a daily pill is simple, but you need to be aware of some possible interactions—for example, antacids and supplemental iron can interfere with thyroid hormone absorption and should be taken at a different time. Below is a list of medicines and therapies that can interact to greater and lesser degrees with your thyroid medication.