Drug interactions
Lofexidine + Phenylephrine po
Severity: Minor
Lofexidine and Phenylephrine po: minor 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
Oral phenylephrine is a decongestant with alpha-1 agonist activity that may raise blood pressure slightly, whereas lofexidine lowers blood pressure. The effects oppose each other, and clinical significance is probably small because oral phenylephrine has low bioavailability.
What this interaction means in plain words
Lofexidine and Phenylephrine po have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Opposing adrenergic effects on vascular tone.
What to do
No specific action is needed; monitor blood pressure if the decongestant is used regularly.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Lofexidine and Phenylephrine po, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
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 Phenylephrine po?
MediHelp rates the interaction as minor. Lofexidine and Phenylephrine po have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Oral phenylephrine is a decongestant with alpha-1 agonist activity that may raise blood pressure slightly, whereas lofexidine lowers blood pressure. The effects oppose each other, and clinical significance is probably small because oral phenylephrine has low bioavailability.
How serious is the interaction between Lofexidine and Phenylephrine po?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No specific action is needed; monitor blood pressure if the decongestant is used regularly.
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.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
