Interazioni tra farmaci
Etoposide + Fosphenytoin
Gravità: Maggiore
Etoposide and Fosphenytoin: major interaction.
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Sintesi
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.
Cosa significa questa interazione in parole semplici
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.
Perché avviene
Induction of CYP3A4 increases etoposide metabolism.
Cosa fare
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.
Cosa chiedere al farmacista
- 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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Altre interazioni di Etoposide
- Adenovirus types 4 and 7 live + Etoposide Controindicata
- Etoposide + Pentostatin Controindicata
- Cyclosporine + Etoposide Maggiore
- Cyclosporin + Etoposide Maggiore
- Elvitegravir / cobicistat / emtricitabine / tenofovir df + Etoposide Maggiore
- Etoposide + Fingolimod Maggiore
Altre interazioni di Fosphenytoin
- Dronedarone + Fosphenytoin Controindicata
- Fosphenytoin + Ledipasvir-sofosbuvir Controindicata
- Fosphenytoin + Lorlatinib Controindicata
- Fosphenytoin + Lurasidone Controindicata
- Fosphenytoin + Ranolazine Controindicata
- Fosphenytoin + Sofosbuvir-velpatasvir-voxilaprevir Controindicata
Domande frequenti
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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