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EasyCardiologyDrug Interaction / Contraindicationmrcgp aktukmlapaneprescribing safety assessment

A 78-year-old man with stable angina pectoris is managed with regular Isosorbide Mononitrate MR 60mg once daily and uses his Glyceryl Trinitrate (GTN) spray occasionally for chest pain. He develops erectile dysfunction and asks about treatment options. Which medication is absolutely contraindicated due to a potentially life-threatening interaction?

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