Risperidone Intramuscular Monthly (Risvan)/Strong CYP2D6 Inhibitors Interactions

This information is generalized and not intended as specific medical advice. Consult your healthcare professional before taking or discontinuing any drug or commencing any course of treatment.

Medical warning:

Moderate. These medicines may cause some risk when taken together. Contact your healthcare professional (e.g. doctor or pharmacist) for more information.

How the interaction occurs:

Your medicines may slow down how quickly your liver processes risperidone.

What might happen:

The amount of risperidone in your blood may increase. This may cause you to have more side effects from your medicine.

What you should do about this interaction:

If you notice any new or worsening side effects, contact your healthcare professional (e.g. doctor or pharmacist). Your doctor may want to check the amount of risperidone in your blood or change your medicines.Your healthcare professionals may already be aware of this interaction and may be monitoring you for it. Do not start, stop, or change the dosage of any medicine before checking with them first.

  • 1.Risvan (risperidone) US prescribing information. Laboratorios Farmaceuticos Rovi S.A. Madrid, Spain March, 2024.
  • 2.Spina E, Avenoso A, Scordo MG, Ancione M, Madia A, Gatti G, Perucca E. Inhibition of risperidone metabolism by fluoxetine in patients with schizophrenia: a clinically relevant pharmacokinetic drug interaction. J Clin Psychopharmacol 2002 Aug;22(4):419-23.
  • 3.Bondolfi G, Eap CB, Bertschy G, Zullino D, Vermeulen A, Baumann P. The effect of fluoxetine on the pharmacokinetics and safety of risperidone in psychiatric patients. Pharmacopsychiatry 2002 Mar;35(2):50-6.
  • 4.Spina E, Avenoso A, Facciola G, Scordo MG, Ancione M, Madia A. Plasma concentrations of risperidone and 9-hydroxyrisperidone during combined treatment with paroxetine. Ther Drug Monit 2001 Jun;23(3):223-7.
  • 5.This information is based on an extract from the Certara Drug Interaction Database (DIDB) Platform, Copyright Certara 1999-2023..

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CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.