Interações medicamentosas
Etoposide + Fosphenytoin
Gravidade: Grave
Etoposide and Fosphenytoin: 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.
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Resumo
Phenytoin, the active form of fosphenytoin, strongly induces CYP3A4 and can increase etoposide clearance. Reduced etoposide exposure may lower antitumor efficacy, and enzyme-inducing anticonvulsants have been linked to poorer outcomes.
O que esta interação significa em palavras simples
Etoposide and Fosphenytoin 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.
Etoposide belongs to Oncology; Fosphenytoin belongs to Central Nervous System.
Por que acontece
Induction of CYP3A4 increases etoposide metabolism.
O que fazer
Where possible, switch to a non-enzyme-inducing antiseizure drug such as levetiracetam. If it must continue, monitor response and consider higher etoposide dosing guided by specialist oncology advice.
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 Etoposide
- Adenovirus types 4 and 7 live + Etoposide Contraindicada
- Etoposide + Pentostatin Contraindicada
- Cyclosporine + Etoposide Grave
- Cyclosporin + Etoposide Grave
- Elvitegravir / cobicistat / emtricitabine / tenofovir df + Etoposide Grave
- Etoposide + Fingolimod Grave
Outras interações de Fosphenytoin
- Dronedarone + Fosphenytoin Contraindicada
- Fosphenytoin + Ledipasvir-sofosbuvir Contraindicada
- Fosphenytoin + Lorlatinib Contraindicada
- Fosphenytoin + Lurasidone Contraindicada
- Fosphenytoin + Ranolazine Contraindicada
- Fosphenytoin + Sofosbuvir-velpatasvir-voxilaprevir Contraindicada
Perguntas frequentes
Can I take Etoposide with Fosphenytoin?
MediHelp rates the interaction as major. Etoposide and Fosphenytoin 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. Phenytoin, the active form of fosphenytoin, strongly induces CYP3A4 and can increase etoposide clearance. Reduced etoposide exposure may lower antitumor efficacy, and enzyme-inducing anticonvulsants have been linked to poorer outcomes.
How serious is the interaction between Etoposide and Fosphenytoin?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Where possible, switch to a non-enzyme-inducing antiseizure drug such as levetiracetam. If it must continue, monitor response and consider higher etoposide dosing guided by specialist oncology advice.
What other medicines interact with Etoposide?
MediHelp also lists interactions of Etoposide with, for example, Adenovirus types 4 and 7 live, Pentostatin, Cyclosporine. The full list is on the Etoposide page.
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