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Interazioni tra farmaci

Clozapine + Fesoterodine

Gravità: Maggiore

Clozapine and Fesoterodine: major interaction.

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Sintesi

Clozapine is strongly anticholinergic, and adding fesoterodine increases the risk of constipation, which with clozapine can progress to serious gastrointestinal hypomotility or ileus. Urinary retention, tachycardia and delirium may also occur.

Cosa significa questa interazione in parole semplici

Clozapine and Fesoterodine 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.

Clozapine belongs to Central Nervous System; Fesoterodine belongs to Genitourinary.

Livello di evidenza: Moderate

Perché avviene

Additive antimuscarinic effects causing reduced gastrointestinal and bladder motility.

Cosa fare

Avoid the combination if possible; if used, monitor bowel function closely, treat constipation proactively, and review for alternatives such as a non-antimuscarinic bladder agent.

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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Domande frequenti

Can I take Clozapine with Fesoterodine?

MediHelp rates the interaction as major. Clozapine and Fesoterodine 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. Clozapine is strongly anticholinergic, and adding fesoterodine increases the risk of constipation, which with clozapine can progress to serious gastrointestinal hypomotility or ileus. Urinary retention, tachycardia and delirium may also occur.

How serious is the interaction between Clozapine and Fesoterodine?

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 if possible; if used, monitor bowel function closely, treat constipation proactively, and review for alternatives such as a non-antimuscarinic bladder agent.

What other medicines interact with Fesoterodine?

MediHelp also lists interactions of Fesoterodine with, for example, Bethanechol, Levoketoconazole, Pramlintide. The full list is on the Fesoterodine page.

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