Drug interactions
Imipramine + Lofexidine
Severity: Moderate
Imipramine and Lofexidine: 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 agents cause sedation, and lofexidine can cause hypotension, bradycardia and QT prolongation, which imipramine may add to. Tricyclic antidepressants may also blunt the antihypertensive effect of alpha-2 agonists such as clonidine, and a similar reduction in lofexidine effect is plausible.
What this interaction means in plain words
Imipramine and Lofexidine 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.
Imipramine belongs to Central Nervous System; Lofexidine belongs to Central Nervous System.
Why it happens
Additive CNS depression and QT effects; tricyclics may antagonize alpha-2 agonist activity, though the mechanism for lofexidine is not firmly established.
What to do
Monitor blood pressure, heart rate, sedation and ECG during co-administration. Watch for reduced withdrawal symptom control and adjust therapy accordingly.
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 Imipramine
- Dronedarone + Imipramine Contraindicated
- Imipramine + Isocarboxazid Contraindicated
- Imipramine + Phenelzine Contraindicated
- Imipramine + Pimozide Contraindicated
- Imipramine + Rasagiline Contraindicated
- Imipramine + Safinamide Contraindicated
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 Imipramine with Lofexidine?
MediHelp rates the interaction as moderate. Imipramine and Lofexidine 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 agents cause sedation, and lofexidine can cause hypotension, bradycardia and QT prolongation, which imipramine may add to. Tricyclic antidepressants may also blunt the antihypertensive effect of alpha-2 agonists such as clonidine, and a similar reduction in lofexidine effect is plausible.
How serious is the interaction between Imipramine and Lofexidine?
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, sedation and ECG during co-administration. Watch for reduced withdrawal symptom control and adjust therapy accordingly.
What other medicines interact with Imipramine?
MediHelp also lists interactions of Imipramine with, for example, Dronedarone, Isocarboxazid, Phenelzine. The full list is on the Imipramine page.
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