Drug interactions
Lofexidine + Risperidone
Severity: Moderate
Lofexidine 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 cause sedation, hypotension and bradycardia, and lofexidine can also prolong the QT interval as can risperidone. Combined use may increase dizziness, falls and arrhythmia risk.
What this interaction means in plain words
Lofexidine 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.
Lofexidine belongs to Central Nervous System; Risperidone belongs to Central Nervous System.
Why it happens
Additive CNS depression and hypotension (alpha-2 agonism with alpha-1 blockade), plus additive QT prolongation.
What to do
Monitor blood pressure, heart rate and sedation, and obtain an ECG if other QT-prolonging risk factors are present. Correct electrolyte abnormalities.
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
Other interactions of Lofexidine
- Adagrasib + Lofexidine Major
- Alfuzosin + Lofexidine Major
- Amiodarone + Lofexidine Major
- Amisulpride + Lofexidine Major
- Anagrelide + Lofexidine Major
- Apomorphine + Lofexidine Major
Frequently asked questions
Can I take Lofexidine with Risperidone?
MediHelp rates the interaction as moderate. Lofexidine 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 cause sedation, hypotension and bradycardia, and lofexidine can also prolong the QT interval as can risperidone. Combined use may increase dizziness, falls and arrhythmia risk.
How serious is the interaction between Lofexidine 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: Monitor blood pressure, heart rate and sedation, and obtain an ECG if other QT-prolonging risk factors are present. Correct electrolyte abnormalities.
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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