Drug interactions
Lofexidine + Loxapine
Severity: Moderate
Lofexidine and Loxapine: 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
Lofexidine is an alpha-2 agonist that causes sedation, hypotension, bradycardia and QT prolongation. Loxapine adds sedation and orthostatic hypotension, so the combination can increase these effects and cardiac risk.
What this interaction means in plain words
Lofexidine and Loxapine 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; Loxapine belongs to Central Nervous System.
Why it happens
Additive CNS depression and hypotension, with additive QT-prolonging potential.
What to do
Monitor blood pressure, heart rate and sedation, and consider an ECG when starting therapy. Correct hypokalemia and hypomagnesemia, and avoid further QT-prolonging drugs.
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 Loxapine
- Alfentanil + Loxapine Major
- Alprazolam + Loxapine Major
- Amisulpride + Loxapine Major
- Amoxapine + Loxapine Major
- Apomorphine + Loxapine Major
- Belladonna and opium + Loxapine 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 Loxapine?
MediHelp rates the interaction as moderate. Lofexidine and Loxapine 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 is an alpha-2 agonist that causes sedation, hypotension, bradycardia and QT prolongation. Loxapine adds sedation and orthostatic hypotension, so the combination can increase these effects and cardiac risk.
How serious is the interaction between Lofexidine and Loxapine?
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 consider an ECG when starting therapy. Correct hypokalemia and hypomagnesemia, and avoid further QT-prolonging drugs.
What other medicines interact with Loxapine?
MediHelp also lists interactions of Loxapine with, for example, Alfentanil, Alprazolam, Amisulpride. The full list is on the Loxapine page.
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