Interações medicamentosas
Clozapine + Darifenacin
Gravidade: Grave
Clozapine and Darifenacin: 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
Both drugs have anticholinergic activity, and clozapine already causes constipation that can progress to severe gastrointestinal hypomotility or ileus. Adding darifenacin raises the risk of constipation, urinary retention, tachycardia and cognitive effects. Darifenacin may also modestly increase clozapine exposure by CYP2D6 inhibition.
O que esta interação significa em palavras simples
Clozapine and Darifenacin 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; Darifenacin belongs to Genitourinary.
Por que acontece
Additive antimuscarinic effects, with possible CYP2D6 inhibition by darifenacin raising clozapine levels.
O que fazer
Avoid the combination where possible, or monitor bowel function closely and treat constipation early. Review the need for darifenacin and reduce the clozapine dose if toxicity occurs.
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 Darifenacin
Outras interações de Clozapine
- Clozapine + Deferiprone Contraindicada
- Clozapine + Irinotecan Contraindicada
- Clozapine + Pimozide Contraindicada
- Clozapine + Thioridazine Contraindicada
- Acalabrutinib + Clozapine Grave
- Adagrasib + Clozapine Grave
Perguntas frequentes
Can I take Clozapine with Darifenacin?
MediHelp rates the interaction as major. Clozapine and Darifenacin 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. Both drugs have anticholinergic activity, and clozapine already causes constipation that can progress to severe gastrointestinal hypomotility or ileus. Adding darifenacin raises the risk of constipation, urinary retention, tachycardia and cognitive effects. Darifenacin may also modestly increase clozapine exposure by CYP2D6 inhibition.
How serious is the interaction between Clozapine and Darifenacin?
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, or monitor bowel function closely and treat constipation early. Review the need for darifenacin and reduce the clozapine dose if toxicity occurs.
What other medicines interact with Darifenacin?
MediHelp also lists interactions of Darifenacin with, for example, Atazanavir, Bethanechol, Clarithromycin. The full list is on the Darifenacin page.
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