Colestipol and Levothyroxine and liothyronine interaction
Colestipol and Levothyroxine and liothyronine: the Levothyroxine and liothyronine prescribing label mentions this combination without an instruction to avoid it or change the dose.
Mentioned, no instruction to avoid. Worth knowing; rarely a reason to change anything on its own.
What the FDA labels say
From the Levothyroxine and liothyronine (NP Thyroid 60) label · effective 2026-01-01
Cholestyramine or Colestipol - Cholestyramine or colestipol binds both T 4 and T 3 in the intestine, thus impairing absorption of these thyroid hormones.
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.