藥物交互作用
Ciprofloxacin + Theophylline
嚴重程度: 嚴重
Ciprofloxacin and Theophylline: major interaction.
最後更新 來源: US FDA label
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摘要
Ciprofloxacin reduces theophylline clearance and can raise serum theophylline concentrations substantially in some patients. This can lead to nausea, tachycardia, arrhythmias and seizures. Elderly patients, those with high baseline levels, liver disease or heart failure, and smokers who stop are at greater risk.
用白話說明這項交互作用的意義
Ciprofloxacin and Theophylline 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.
Ciprofloxacin belongs to Anti Bacterial; Theophylline belongs to Respiratory.
為什麼會發生
Ciprofloxacin inhibits CYP1A2, the main enzyme metabolising theophylline, decreasing its clearance.
處置方式
Prefer an antibiotic that does not inhibit CYP1A2. If ciprofloxacin is needed, measure theophylline levels before and during therapy and reduce the theophylline dose empirically.
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?
參考資料
Theophylline 的其他交互作用
Ciprofloxacin 的其他交互作用
常見問題
Can I take Ciprofloxacin with Theophylline?
MediHelp rates the interaction as major. Ciprofloxacin and Theophylline 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. Ciprofloxacin reduces theophylline clearance and can raise serum theophylline concentrations substantially in some patients. This can lead to nausea, tachycardia, arrhythmias and seizures. Elderly patients, those with high baseline levels, liver disease or heart failure, and smokers who stop are at greater risk.
How serious is the interaction between Ciprofloxacin and Theophylline?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Prefer an antibiotic that does not inhibit CYP1A2. If ciprofloxacin is needed, measure theophylline levels before and during therapy and reduce the theophylline dose empirically.
What other medicines interact with Theophylline?
MediHelp also lists interactions of Theophylline with, for example, Riociguat, Adenosine, Apalutamide. The full list is on the Theophylline page.
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