Drug interactions
Cyclobenzaprine + Phenylephrine po
Severity: Minor
Cyclobenzaprine 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
Cyclobenzaprine is a tricyclic-related drug that can affect adrenergic function and cause tachycardia, while oral phenylephrine is a sympathomimetic that can raise blood pressure. The combination might produce additive cardiovascular stimulation, though clinical data are limited and the sedative effects do not meaningfully offset each other.
What this interaction means in plain words
Cyclobenzaprine 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
Possible additive cardiovascular effects through sympathomimetic action and anticholinergic tachycardia; not well established.
What to do
Monitor heart rate and blood pressure in patients with cardiovascular disease using both drugs; no routine adjustment is needed otherwise.
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 Cyclobenzaprine 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 Cyclobenzaprine
- Cyclobenzaprine + Isocarboxazid Contraindicated
- Cyclobenzaprine + Linezolid Contraindicated
- Cyclobenzaprine + Phenelzine Contraindicated
- Cyclobenzaprine + Safinamide Contraindicated
- Cyclobenzaprine + Selegiline Contraindicated
- Cyclobenzaprine + Selegiline transdermal Contraindicated
Frequently asked questions
Can I take Cyclobenzaprine with Phenylephrine po?
MediHelp rates the interaction as minor. Cyclobenzaprine 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. Cyclobenzaprine is a tricyclic-related drug that can affect adrenergic function and cause tachycardia, while oral phenylephrine is a sympathomimetic that can raise blood pressure. The combination might produce additive cardiovascular stimulation, though clinical data are limited and the sedative effects do not meaningfully offset each other.
How serious is the interaction between Cyclobenzaprine 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: Monitor heart rate and blood pressure in patients with cardiovascular disease using both drugs; no routine adjustment is needed otherwise.
What other medicines interact with Cyclobenzaprine?
MediHelp also lists interactions of Cyclobenzaprine with, for example, Isocarboxazid, Linezolid, Phenelzine. The full list is on the Cyclobenzaprine 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.
