Levothyroxine timing: a real interaction with a simple fix

Picking up the opening post: that is the part I would want checked first.

Anything that also slows gut motility compounds the same mechanism. That is a plausibility argument rather than a documented interaction, and it should be labelled as one.

It is the sort of thing that seems obvious in retrospect and was not at the time.

This follows post #5 rather than contradicting it.

Renal or hepatic impairment changes the calculus for a lot of combinations and is the context most often missing from an interaction question here.

I looked this up rather than remembered it, which is the right order.

Useful. I have added it to my own notes with the date on it.

Same experience here, different supplier, so it is at least not unique to one of them.

Absence of an interaction study is not evidence of no interaction. A great many combinations discussed here have simply never been studied, and saying so is more useful than reasoning from mechanism alone.

Adding it in case it saves somebody the afternoon it cost me.