A 27-year-old woman at 8 weeks of gestation presents to the GP with a urinary tract infection. She mentions she has been taking cranberry supplements ...

Question

A 27-year-old woman at 8 weeks of gestation presents to the GP with a urinary tract infection. She mentions she has been taking cranberry supplements daily to prevent UTIs. She asks whether cranberry is safe in pregnancy and whether it interacts with any medications. Which is the most important drug interaction to consider?

Accepted Answer

Cranberry interacts with warfarin - it may potentiate the anticoagulant effect and increase INR

Answer

Cranberry interacts with metformin

Answer

Cranberry is contraindicated in pregnancy

Answer

Cranberry interacts with levothyroxine

Answer

There are no drug interactions with cranberry

uk-drcog MCQ (SBA): Cranberry-Warfarin Interaction