藥物交互作用
Nitroglycerin + Sildenafil
嚴重程度: 禁忌併用
Nitroglycerin and Sildenafil: contraindicated interaction.
最後更新 來源: US FDA label
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摘要
Sildenafil greatly potentiates the vasodilator effect of nitrates, which can produce profound, prolonged hypotension, syncope, myocardial ischemia or infarction. Patients with coronary disease who use nitrates are the typical population at risk. Labeling of both drugs contraindicates the combination.
用白話說明這項交互作用的意義
Nitroglycerin and Sildenafil are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.
Nitroglycerin belongs to Cardiovascular; Sildenafil belongs to Genitourinary.
為什麼會發生
Nitroglycerin releases nitric oxide to increase cGMP, while sildenafil inhibits PDE5-mediated cGMP breakdown, causing exaggerated vasodilation.
處置方式
Do not give nitrates to patients who have taken sildenafil within 24 hours. Patients with chest pain who recently took sildenafil need urgent medical assessment and non-nitrate approaches, and nitrates should be avoided for at least 24 hours after the dose.
可向藥師詢問的問題
- Is there an alternative to one of these two medicines for me?
- If both are essential, who is monitoring me and how often?
- Which symptoms mean I should stop and seek help straight away?
參考資料
Nitroglycerin 的其他交互作用
Sildenafil 的其他交互作用
常見問題
Can I take Nitroglycerin with Sildenafil?
MediHelp rates the interaction as contraindicated. Nitroglycerin and Sildenafil are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Sildenafil greatly potentiates the vasodilator effect of nitrates, which can produce profound, prolonged hypotension, syncope, myocardial ischemia or infarction. Patients with coronary disease who use nitrates are the typical population at risk. Labeling of both drugs contraindicates the combination.
How serious is the interaction between Nitroglycerin and Sildenafil?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Do not give nitrates to patients who have taken sildenafil within 24 hours. Patients with chest pain who recently took sildenafil need urgent medical assessment and non-nitrate approaches, and nitrates should be avoided for at least 24 hours after the dose.
What other medicines interact with Nitroglycerin?
MediHelp also lists interactions of Nitroglycerin with, for example, Avanafil, Riociguat, Tadalafil. The full list is on the Nitroglycerin page.
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