Drug interactions
Lofexidine + Metyrosine
Severity: Moderate
Lofexidine and Metyrosine: 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
Metyrosine depletes catecholamines and lowers blood pressure, and lofexidine also reduces sympathetic outflow. Combining them may cause excessive hypotension and sedation.
What this interaction means in plain words
Lofexidine and Metyrosine 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; Metyrosine belongs to Miscellaneous.
Why it happens
Additive sympatholytic effect: tyrosine hydroxylase inhibition plus central alpha-2 agonism.
What to do
Monitor blood pressure, heart rate and sedation, particularly after dose changes. Reduce the dose of either agent if hypotension or marked sedation occurs.
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 Metyrosine
- Carbidopa-levodopa + Metyrosine Major
- Fluphenazine + Metyrosine Major
- Metoclopramide + Metyrosine Major
- Carbidopa-entacapone-levodopa + Metyrosine Moderate
- Chlorpromazine + Metyrosine Moderate
- Clonidine + Metyrosine Moderate
Frequently asked questions
Can I take Lofexidine with Metyrosine?
MediHelp rates the interaction as moderate. Lofexidine and Metyrosine 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. Metyrosine depletes catecholamines and lowers blood pressure, and lofexidine also reduces sympathetic outflow. Combining them may cause excessive hypotension and sedation.
How serious is the interaction between Lofexidine and Metyrosine?
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, particularly after dose changes. Reduce the dose of either agent if hypotension or marked sedation occurs.
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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