Drug interactions
Lofexidine + Prazosin
Severity: Moderate
Lofexidine and Prazosin: 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 lower blood pressure, and combining them can cause marked hypotension, dizziness and syncope. Lofexidine also slows heart rate, which may add to the effect.
What this interaction means in plain words
Lofexidine and Prazosin 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; Prazosin belongs to Genitourinary.
Why it happens
Additive hypotension from alpha-1 blockade and central alpha-2 agonism.
What to do
Monitor blood pressure and pulse, especially after dose changes, and advise slow postural changes. Reduce the dose of one drug if symptomatic.
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
Other interactions of Prazosin
- Alfuzosin + Prazosin Major
- Amifostine + Prazosin Major
- Avanafil + Prazosin Major
- Doxazosin + Prazosin Major
- Dutasteride-tamsulosin + Prazosin Major
- Phenoxybenzamine + Prazosin Major
Frequently asked questions
Can I take Lofexidine with Prazosin?
MediHelp rates the interaction as moderate. Lofexidine and Prazosin 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 lower blood pressure, and combining them can cause marked hypotension, dizziness and syncope. Lofexidine also slows heart rate, which may add to the effect.
How serious is the interaction between Lofexidine and Prazosin?
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 and pulse, especially after dose changes, and advise slow postural changes. Reduce the dose of one drug if symptomatic.
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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