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Interazioni tra farmaci

Phenytoin + Roflumilast

Gravità: Maggiore

Phenytoin and Roflumilast: major interaction.

Ultimo aggiornamento Fonti: US FDA label

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Sintesi

Phenytoin is a strong inducer of CYP enzymes and can substantially lower roflumilast and active metabolite exposure. Roflumilast labeling advises against use with strong inducers because efficacy may be lost.

Cosa significa questa interazione in parole semplici

Phenytoin 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.

Phenytoin belongs to Central Nervous System; Roflumilast belongs to Respiratory.

Livello di evidenza: Moderate

Perché avviene

Induction of CYP3A4 and CYP1A2 by phenytoin increases roflumilast metabolism.

Cosa fare

Avoid the combination and consider an alternative COPD therapy. If both are continued, monitor exacerbation frequency closely.

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?

Bring a full list of your medicines, including over-the-counter products, supplements and herbal remedies, to every pharmacy visit.

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Riferimenti

Domande frequenti

Can I take Phenytoin with Roflumilast?

MediHelp rates the interaction as major. Phenytoin 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. Phenytoin is a strong inducer of CYP enzymes and can substantially lower roflumilast and active metabolite exposure. Roflumilast labeling advises against use with strong inducers because efficacy may be lost.

How serious is the interaction between Phenytoin 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 and consider an alternative COPD therapy. If both are continued, monitor exacerbation frequency closely.

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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