藥物交互作用
Riociguat + Sildenafil
嚴重程度: 禁忌併用
Riociguat and Sildenafil: contraindicated interaction.
最後更新 來源: US FDA label
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摘要
Combining riociguat with PDE5 inhibitors such as sildenafil causes additive systemic vasodilation and can lead to hypotension. In a pulmonary arterial hypertension study, adding riociguat to sildenafil showed no favorable benefit and was associated with unfavorable outcomes including more deaths. Riociguat labeling contraindicates concomitant PDE5 inhibitors.
用白話說明這項交互作用的意義
Riociguat 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.
Riociguat belongs to Cardiovascular; Sildenafil belongs to Genitourinary.
為什麼會發生
Riociguat stimulates soluble guanylate cyclase to raise cGMP, and sildenafil blocks cGMP degradation via PDE5, so the effects on the nitric oxide-cGMP pathway are additive.
處置方式
Do not use the two together. When switching, stop sildenafil at least 24 hours before starting riociguat, and consider specialist guidance on the transition.
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
- Adempas (riociguat) Prescribing Information - Contraindications — FDA Label
- Adempas (riociguat) Summary of Product Characteristics — EMA SmPC
Riociguat 的其他交互作用
Sildenafil 的其他交互作用
常見問題
Can I take Riociguat with Sildenafil?
MediHelp rates the interaction as contraindicated. Riociguat 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. Combining riociguat with PDE5 inhibitors such as sildenafil causes additive systemic vasodilation and can lead to hypotension. In a pulmonary arterial hypertension study, adding riociguat to sildenafil showed no favorable benefit and was associated with unfavorable outcomes including more deaths. Riociguat labeling contraindicates concomitant PDE5 inhibitors.
How serious is the interaction between Riociguat 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 use the two together. When switching, stop sildenafil at least 24 hours before starting riociguat, and consider specialist guidance on the transition.
What other medicines interact with Riociguat?
MediHelp also lists interactions of Riociguat with, for example, Avanafil, Dipyridamole, Isosorbide dinitrate. The full list is on the Riociguat page.
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