Interações medicamentosas
Conivaptan + Darifenacin
Gravidade: Grave
Conivaptan and Darifenacin: major interaction.
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Para profissionais de saúde — apenas referência. Esta página é um resumo breve, não é aconselhamento médico nem substitui a bula oficial ou o julgamento clínico. Verifique sempre antes de prescrever ou dispensar.
O conteúdo clínico desta página está disponível apenas em inglês.
Resumo
Conivaptan is a CYP3A4 inhibitor and can increase darifenacin exposure, raising the risk of anticholinergic adverse effects. Conivaptan is a CYP3A4 substrate too, though the reverse effect from darifenacin is not clinically significant.
O que esta interação significa em palavras simples
Conivaptan and Darifenacin 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.
Por que acontece
Inhibition of CYP3A4 by conivaptan reduces darifenacin clearance.
O que fazer
Limit darifenacin to the lowest dose (7.5 mg daily) and monitor for anticholinergic toxicity during conivaptan infusion. Consider holding darifenacin if toxicity appears.
O que perguntar ao farmacêutico
- 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?
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Outras interações de Darifenacin
Perguntas frequentes
Can I take Conivaptan with Darifenacin?
MediHelp rates the interaction as major. Conivaptan and Darifenacin 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. Conivaptan is a CYP3A4 inhibitor and can increase darifenacin exposure, raising the risk of anticholinergic adverse effects. Conivaptan is a CYP3A4 substrate too, though the reverse effect from darifenacin is not clinically significant.
How serious is the interaction between Conivaptan and Darifenacin?
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 darifenacin to the lowest dose (7.5 mg daily) and monitor for anticholinergic toxicity during conivaptan infusion. Consider holding darifenacin if toxicity appears.
What other medicines interact with Darifenacin?
MediHelp also lists interactions of Darifenacin with, for example, Atazanavir, Bethanechol, Clarithromycin. The full list is on the Darifenacin page.
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