A nurse is reviewing the medical record of a client who has a new prescription for warfarin. Which of the following findings should the nurse identify as a contraindication for this medication?

Choice A reason: A history of myocardial infarction is not a contraindication for warfarin, often used to prevent thromboembolism in such patients. It requires monitoring, but this is not a barrier, making it incorrect. Choice B reason: Current peptic ulcer disease is a contraindication for warfarin, as anticoagulation increases bleeding risk in active ulcers. This can lead to life-threatening hemorrhage, making it the correct finding to identify. Choice C reason: Hypertension is a caution, not a contraindication, for warfarin. Controlled blood pressure allows safe use, with monitoring for bleeding risk, making this incorrect as a contraindication. Choice D reason: Type 2 diabetes mellitus does not contraindicate warfarin. It requires glycemic control to avoid complications, but diabetes itself is not a barrier, making this incorrect.