Interações medicamentosas
Fosphenytoin + Roflumilast
Gravidade: Grave
Fosphenytoin and Roflumilast: major interaction.
Última atualização
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
Fosphenytoin is converted to phenytoin, which induces CYP3A4 and CYP1A2 and substantially reduces roflumilast exposure. Therapeutic effect may be lost.
O que esta interação significa em palavras simples
Fosphenytoin and Roflumilast 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.
Fosphenytoin belongs to Central Nervous System; Roflumilast belongs to Respiratory.
Por que acontece
Phenytoin induces CYP3A4 and CYP1A2, increasing roflumilast clearance.
O que fazer
Avoid the combination where possible, as the label advises against strong inducers. If both are required, monitor COPD control closely and consider an alternative to roflumilast.
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 Roflumilast
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 Fosphenytoin with Roflumilast?
MediHelp rates the interaction as major. Fosphenytoin and Roflumilast 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. Fosphenytoin is converted to phenytoin, which induces CYP3A4 and CYP1A2 and substantially reduces roflumilast exposure. Therapeutic effect may be lost.
How serious is the interaction between Fosphenytoin and Roflumilast?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination where possible, as the label advises against strong inducers. If both are required, monitor COPD control closely and consider an alternative to roflumilast.
What other medicines interact with Roflumilast?
MediHelp also lists interactions of Roflumilast with, for example, Apalutamide, Carbamazepine, Efavirenz. The full list is on the Roflumilast page.
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