Can you tell me exactly when is the best time to take my thyroid medicines and my vitamins?

Ask your doctor: This is a very important question to ask your doctor, because different docs have slightly different ideas on this. Ideally, thyroid hormone should be taken on an empty stomach - at least 2 hours after and 1 hour before eating, and at least 1-2 hours away from any source of iron or calcium. That can be hard and cause ppl to miss pills. Some docs are more flexible on these guidelines than others.