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Q. Can Synthroid and ferrous sulfate be taken at the same time of the day?
A. No. Iron supplements such as ferrous sulfate interfere with the absorption of Synthroid (levothyroxine) taken to treat thyroid problems. Wait at least two hours after Synthroid before taking iron, calcium or other minerals.

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I have taken my synthroid for years with iron. I have this listed with all my meds & supplements with the time taken. I give this list whenever I go to the Doctor. Not one has ever informed me that this is bad.
This an example of why we need to check every aspect of our care & not just rely on the medical profession to keep us informed.
Thanks for helping to keep us informed.
My doctor first noticed I had a low white blood count and after several test sent me to a blood specialist. He did after several visits a bone marrow and found I had no iron in my storage system. He gave me a infusion of iron, but this has not brought my count up. I cannot tolerate iron vitamins. I have tried eating food containing iron, but this has not helped. I have started taking a One A Day Vitamin For Women. Any help for this would be very appreciated.
Same effect w/other irons such as ferrous fumarate? (in my Trader Joe's Multiple Vitamin & Minerals)
Hi,
I did not know that I should not take Synthroid with Calcium & Iron.
I have been taking them with breakfast every day for 4 months now, and as a result, I am convinced that this is why I have been having all these symptoms of feeling dizzy, very cold all the time, numbness in fingers and toes, sore, achy hands and feet.
Now I know. Do not take Synthroid with Food, wait at least 1\2 hour, then have your meal, and wait 2 hours before taking other supplements.
Thanks.
Because synthroid is absorbed in the lower intestine, I heard you should wait at least four hours before taking synthroid and calcium and/or iron supplements.
PEOPLE'S PHARMACY RESPONSE: IT WOULD BE BEST TO TAKE THE SYNTHROID FIRST THING IN THE MORNING (OR LAST THING AT NIGHT) ON AN EMPTY STOMACH, THEN WAIT TO TAKE CALCIUM OR IRON SUPPLEMENTS.
I was informed and have done research on this matter, that Snythroid should be taken on a completely empty stomach, and also no food should be consumed approximately 2 hours after you take the pill. I also have anemia, and need to take an iron supplement. I solve this dilemma the following way: First thing in the morning (like with in 5 minutes) I take my synthroid with *water. Then, I get ready etc. I grab breakfast on the way to work and eat once I get there. This usually eats up the 2 hour time slot I need to let the snythroid start to do it's job.
*remember not to take your synthroid with OJ or milk etc. as it makes the medicine ineffective.
In the evening before bed, I take my iron supplement and my daily vitamin.
I hope this helps everyone. It's really frustrating when you need two pills that you can't take at the same time of the day, and both are responsible for giving you energy to make it through the day!!!
I am anemic and just started taking Iron again per doctor's request. I have been taking my Synthroid and iron together. Last night I was so tired that I went to bed at 7:30 p.m. Today I started thinking that maybe the iron was negating the Synthroid - so didn't take it this morning. After reading everyone's comments on this website and other websites, I now know for sure to take my iron at night.
I have been taking synthroid for 2 yrs. due to a thyroidectomy but now I also found out I am low in iron, vitamin d and calcium... I take synthroid in morning and I was reading I should take iron at night, but can you take calcium and iron at same time? Thanks for any input!
PEOPLE'S PHARMACY RESPONSE: IT IS MORE IMPORTANT NOT TO TAKE EITHER CALCIUM OR IRON WITH SYNTHROID THAN IT IS NOT TO TAKE THEM WITH EACH OTHER. THEY DO INTERFERE WITH EACH OTHER'S ABSORPTION SOMEWHAT, BUT THEY BOTH REALLY INTERFERE WITH SYNTHROID.