Aa
A
A
Close
246012 tn?1189759430
Synthroid Levothyroxine on Empty Stomach
Sorry if this has been asked before: does anyone know what happens or what doesn't happen if you take the Synthroid NOT on an empty stomach?
Cancel
3 Answers
Page 1 of 1
209384 tn?1231171906
Doesn't work.  Is not absorbed right.
Comment
Cancel
209384 tn?1231171906
Comment
Comment
Submit Comment
246012 tn?1189759430
Strangely enough, I keep taking it without an empty stomach (I just can't seem to wrap my head around this seemingly simple request!!!) and I am still on the hyper side of normal (range 11-22 at 24- still haven't figured out what units these are in).
Comment
Cancel
246012 tn?1189759430
Comment
Comment
Submit Comment
173351 tn?1201217657

Thyroxine is absorbed in the small intestine NOT the stomach. Specifically the jejunum and ileum and the duodenum.  If food is added then;
1.-the amount of time the thyroxine spends in the small intestine is greatly decreased as food increases gastric motility ie. the speed that gastric contents pass through the gastrointestinal tract including the small intestine.
2.-the thyroxine competes with other nutrients for absorbtion in the small intestine

"Fasting will only increase the extent of absorption, whereas malabsorption will only cause a decrease in absorption." (Monthly Index of Medical Supplies [MIMS] 2007)  [MIMS is a medical resource available to health professionals in Australia - not sure about other countries]

The prescribing info for Synthroid states that only 40-80% of the thyroxine you ingest is actually absorbed under the recommended conditions ie. in the absence of food.  

Example; If you normally take 100mcg Synthroid per day then if you take your medication as directed, 30 to 60 minutes before food then your body is getting a true benefit from between 40 and 80mcg.  

**** IF**** you don't take Synthroid on an empty stomach then you could be getting less than 40mcg per day.  WHOA - that's not much!!!  

So if you are wondering why your Synthroid is not having as much effect as you anticipated OR the effect is fluctating THEN start taking it consistently 30-60 minutes before food!!!!!!!!  Just do it - you'll feel better!!!!!

Another aspect is that you might find you could lower your dose if you took your dose correctly (could this result in a lower cost prescription for you guys and gals in America-not sure how it works over there?)

http://www.synthroid.com/

Synthroid's website has some really good, easy to read and understand educational stuff for everyone.  Go have a look even if you take levothyroxine or some other brand.

It pays to know what you are taking and how it works.  Doctors just don't seem to have the time to explain it all in detail to us - though I'm sure if we all understood we would make a better go of it.
Comment
Cancel
173351 tn?1201217657
Comment
Comment
Submit Comment
Your Answer
246012 tn?1189759430
Answer
Know how to answer? Tap here to leave your answer...
Answer
Submit Answer
A
A
Blank
Weight Tracker
Weight Tracker
Start Tracking Now
Thyroid Disorders Community Resources
Top Thyroid Answerers
Avatar m tn
Blank
gimel
MI
Avatar f tn
Blank
goolarra
Sisters, OR
649848 tn?1424570775
Blank
Barb135
FL
Avatar m tn
Blank
flyingfool
WI
1756321 tn?1377771734
Blank
Red_Star
Queensland, Australia
1204245 tn?1356904325
Blank
898_1
Long Beach