Drug interactions
Lofepramine + Risperidone
Severity: Moderate
Lofepramine and Risperidone: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Both drugs can prolong the QT interval and cause sedation and hypotension. Risperidone can also inhibit CYP2D6 weakly, and tricyclics such as lofepramine are partly metabolized by this enzyme, so combined exposure and adverse effects may increase.
What this interaction means in plain words
Lofepramine and Risperidone can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Additive QT prolongation and CNS depression, with possible minor CYP2D6-related pharmacokinetic effects.
What to do
Obtain a baseline ECG and monitor it, and correct potassium and magnesium abnormalities. Monitor for sedation and orthostatic hypotension and reduce doses if needed.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Risperidone
- Ibutilide + Risperidone Contraindicated
- Risperidone + Vandetanib Contraindicated
- Adagrasib + Risperidone Major
- Amiodarone + Risperidone Major
- Amisulpride + Risperidone Major
- Amoxapine + Risperidone Major
Frequently asked questions
Can I take Lofepramine with Risperidone?
MediHelp rates the interaction as moderate. Lofepramine and Risperidone can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Both drugs can prolong the QT interval and cause sedation and hypotension. Risperidone can also inhibit CYP2D6 weakly, and tricyclics such as lofepramine are partly metabolized by this enzyme, so combined exposure and adverse effects may increase.
How serious is the interaction between Lofepramine and Risperidone?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Obtain a baseline ECG and monitor it, and correct potassium and magnesium abnormalities. Monitor for sedation and orthostatic hypotension and reduce doses if needed.
What other medicines interact with Risperidone?
MediHelp also lists interactions of Risperidone with, for example, Ibutilide, Vandetanib, Adagrasib. The full list is on the Risperidone page.
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