Drug interactions
Nadolol + Phenylephrine po
Severity: Moderate
Nadolol and Phenylephrine po: 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
Oral phenylephrine is an alpha agonist, and with nonselective beta-blockade its pressor effect may be unopposed with reflex bradycardia. This can cause hypertensive episodes, which are uncommon at standard decongestant doses.
What this interaction means in plain words
Nadolol and Phenylephrine po 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.
Why it happens
Unopposed alpha-1 vasoconstriction due to beta-blockade, with reflex bradycardia.
What to do
Monitor blood pressure in patients taking nadolol who use oral phenylephrine decongestants. Avoid in patients with uncontrolled hypertension and choose a non-pressor alternative.
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 Nadolol
- Acebutolol + Nadolol Major
- Adrenaline-articaine + Nadolol Major
- Albuterol + Nadolol Major
- Amifostine + Nadolol Major
- Amiodarone + Nadolol Major
- Arformoterol + Nadolol Major
Frequently asked questions
Can I take Nadolol with Phenylephrine po?
MediHelp rates the interaction as moderate. Nadolol and Phenylephrine po 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. Oral phenylephrine is an alpha agonist, and with nonselective beta-blockade its pressor effect may be unopposed with reflex bradycardia. This can cause hypertensive episodes, which are uncommon at standard decongestant doses.
How serious is the interaction between Nadolol and Phenylephrine po?
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 in patients taking nadolol who use oral phenylephrine decongestants. Avoid in patients with uncontrolled hypertension and choose a non-pressor alternative.
What other medicines interact with Nadolol?
MediHelp also lists interactions of Nadolol with, for example, Acebutolol, Adrenaline-articaine, Albuterol. The full list is on the Nadolol page.
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