Drug interactions
Lofexidine + Solifenacin
Severity: Major
Lofexidine and Solifenacin: major 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 prolong the QT interval, and lofexidine additionally causes bradycardia and hypotension, which further raises the risk of torsades de pointes. Combined use may be hazardous in patients with other cardiac risk factors.
What this interaction means in plain words
Lofexidine and Solifenacin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Lofexidine belongs to Central Nervous System; Solifenacin belongs to Genitourinary.
Why it happens
Additive QT prolongation, compounded by lofexidine-induced bradycardia.
What to do
Avoid the combination if possible, or obtain a baseline ECG, correct potassium and magnesium, and monitor ECG, heart rate and blood pressure during therapy. Consider a non-QT-prolonging bladder agent.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Solifenacin
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 Solifenacin?
MediHelp rates the interaction as major. Lofexidine and Solifenacin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Both drugs can prolong the QT interval, and lofexidine additionally causes bradycardia and hypotension, which further raises the risk of torsades de pointes. Combined use may be hazardous in patients with other cardiac risk factors.
How serious is the interaction between Lofexidine and Solifenacin?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination if possible, or obtain a baseline ECG, correct potassium and magnesium, and monitor ECG, heart rate and blood pressure during therapy. Consider a non-QT-prolonging bladder agent.
What other medicines interact with Solifenacin?
MediHelp also lists interactions of Solifenacin with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Solifenacin page.
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