藥物交互作用
Clarithromycin + Tolterodine
嚴重程度: 嚴重
Clarithromycin and Tolterodine: major interaction.
最後更新
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摘要
Clarithromycin is a strong CYP3A4 inhibitor and raises tolterodine exposure, particularly in CYP2D6 poor metabolizers. Increased levels may enhance anticholinergic effects and QT prolongation risk, and both drugs have QT liability.
用白話說明這項交互作用的意義
Clarithromycin and Tolterodine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Clarithromycin belongs to Anti Bacterial; Tolterodine belongs to Genitourinary.
為什麼會發生
Strong CYP3A4 inhibition by clarithromycin reduces tolterodine metabolism, with additive QT effects.
處置方式
Limit tolterodine to 2 mg daily (1 mg twice daily for IR) during co-treatment, or use an alternative antibiotic such as azithromycin; monitor ECG in patients with QT risk factors.
可向藥師詢問的問題
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
Tolterodine 的其他交互作用
Clarithromycin 的其他交互作用
常見問題
Can I take Clarithromycin with Tolterodine?
MediHelp rates the interaction as major. Clarithromycin and Tolterodine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Clarithromycin is a strong CYP3A4 inhibitor and raises tolterodine exposure, particularly in CYP2D6 poor metabolizers. Increased levels may enhance anticholinergic effects and QT prolongation risk, and both drugs have QT liability.
How serious is the interaction between Clarithromycin and Tolterodine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Limit tolterodine to 2 mg daily (1 mg twice daily for IR) during co-treatment, or use an alternative antibiotic such as azithromycin; monitor ECG in patients with QT risk factors.
What other medicines interact with Tolterodine?
MediHelp also lists interactions of Tolterodine with, for example, Clozapine, Cobicistat, Dronedarone. The full list is on the Tolterodine page.
在 MediHelp App 中取得完整藥品專論、劑量資訊與交互作用檢查
在 MediHelp App 中開啟完整參考資料、檢查多種藥物間的交互作用，並使用劑量工具。
