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Interazioni tra farmaci

Clarithromycin + Selumetinib

Gravità: Maggiore

Clarithromycin and Selumetinib: major interaction.

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Sintesi

Clarithromycin may increase selumetinib exposure, which can intensify adverse effects such as gastrointestinal toxicity, rash, cardiomyopathy and ocular toxicity.

Cosa significa questa interazione in parole semplici

Clarithromycin and Selumetinib 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.

Clarithromycin belongs to Anti Bacterial; Selumetinib belongs to Oncology.

Livello di evidenza: High

Perché avviene

Clarithromycin inhibits CYP3A4, reducing selumetinib metabolism.

Cosa fare

Prefer a non-CYP3A4-inhibiting antibiotic. If necessary, reduce the selumetinib dose as per labeling and resume the prior dose after about 3 half-lives of clarithromycin.

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 Clarithromycin with Selumetinib?

MediHelp rates the interaction as major. Clarithromycin and Selumetinib 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. Clarithromycin may increase selumetinib exposure, which can intensify adverse effects such as gastrointestinal toxicity, rash, cardiomyopathy and ocular toxicity.

How serious is the interaction between Clarithromycin and Selumetinib?

MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Prefer a non-CYP3A4-inhibiting antibiotic. If necessary, reduce the selumetinib dose as per labeling and resume the prior dose after about 3 half-lives of clarithromycin.

What other medicines interact with Clarithromycin?

MediHelp also lists interactions of Clarithromycin with, for example, Astemizole, Avanafil, Cisapride. The full list is on the Clarithromycin page.

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