Drug interactions
Lofexidine + Mecamylamine
Severity: Major
Lofexidine and Mecamylamine: 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
Mecamylamine is a ganglionic blocker that causes substantial blood pressure lowering, and lofexidine also reduces blood pressure and heart rate. Combined use can result in profound hypotension, orthostatic symptoms and syncope.
What this interaction means in plain words
Lofexidine and Mecamylamine 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; Mecamylamine belongs to Cardiovascular.
Why it happens
Additive hypotensive effects from ganglionic blockade and central alpha-2 sympatholysis.
What to do
Avoid if possible; if both are needed, monitor supine and standing blood pressure and heart rate closely. Lower the dose of one or both drugs if hypotension develops.
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 Lofexidine
- Adagrasib + Lofexidine Major
- Alfuzosin + Lofexidine Major
- Amiodarone + Lofexidine Major
- Amisulpride + Lofexidine Major
- Anagrelide + Lofexidine Major
- Apomorphine + Lofexidine Major
Other interactions of Mecamylamine
- Bethanechol + Mecamylamine Moderate
- Mecamylamine + Niacin Moderate
- Mecamylamine + Tizanidine Moderate
- Mecamylamine + Vitamin b3 Moderate
Frequently asked questions
Can I take Lofexidine with Mecamylamine?
MediHelp rates the interaction as major. Lofexidine and Mecamylamine 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. Mecamylamine is a ganglionic blocker that causes substantial blood pressure lowering, and lofexidine also reduces blood pressure and heart rate. Combined use can result in profound hypotension, orthostatic symptoms and syncope.
How serious is the interaction between Lofexidine and Mecamylamine?
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 if possible; if both are needed, monitor supine and standing blood pressure and heart rate closely. Lower the dose of one or both drugs if hypotension develops.
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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