Does Grapefruit Affect Levothyroxine?
Does Grapefruit Affect Levothyroxine? Conclusions: Grapefruit juice may slightly delay the absorption of levothyroxine, but it seems to have only a minor effect on its bioavailability. Accordingly, the clinical relevance of the grapefruit juice-levothyroxine interaction is likely to be small. Can you drink grapefruit juice while taking thyroid medication? The effect of grapefruit on levothyroxine