Drug interactions
Lofexidine + Trifluoperazine
Severity: Moderate
Lofexidine and Trifluoperazine: 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
Trifluoperazine can cause sedation, hypotension and QT prolongation, and lofexidine shares these effects. Combined use may increase drowsiness, orthostatic hypotension and arrhythmia risk.
What this interaction means in plain words
Lofexidine and Trifluoperazine 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 CNS depression, hypotension and potential QTc prolongation.
What to do
Monitor sedation and orthostatic blood pressure, and obtain an ECG if other QT risk factors are present. Reduce the dose of either drug if adverse effects occur.
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 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 Trifluoperazine?
MediHelp rates the interaction as moderate. Lofexidine and Trifluoperazine 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. Trifluoperazine can cause sedation, hypotension and QT prolongation, and lofexidine shares these effects. Combined use may increase drowsiness, orthostatic hypotension and arrhythmia risk.
How serious is the interaction between Lofexidine and Trifluoperazine?
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 sedation and orthostatic blood pressure, and obtain an ECG if other QT risk factors are present. Reduce the dose of either drug if adverse effects occur.
What other medicines interact with Lofexidine?
MediHelp also lists interactions of Lofexidine with, for example, Adagrasib, Alfuzosin, Amiodarone. The full list is on the Lofexidine page.
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