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Drug Interactions between nadolol and Xanax

This report displays the potential drug interactions for the following 2 drugs:

  • nadolol
  • Xanax (alprazolam)

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Interactions between your drugs


nadolol ALPRAZolam

Applies to: nadolol and Xanax (alprazolam)

Nadolol and ALPRAZolam may have additive effects in lowering your blood pressure. You may experience headache, dizziness, lightheadedness, fainting, and/or changes in pulse or heart rate. These side effects are most likely to be seen at the beginning of treatment, following a dose increase, or when treatment is restarted after an interruption. Let your doctor know if you develop these symptoms and they do not go away after a few days or they become troublesome. Avoid driving or operating hazardous machinery until you know how the medications affect you, and use caution when getting up from a sitting or lying position. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

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Drug and food interactions


nadolol food

Applies to: nadolol

Consumer information for this interaction is not currently available.

GENERALLY AVOID: Coadministration with green tea may significantly decrease the plasma concentrations of nadolol. The mechanism of interaction has not been established, but may involve inhibition of OATP1A2-mediated uptake of nadolol in the intestine by catechins in green tea. In a study with ten healthy volunteers, administration of a single 30 mg oral dose of nadolol following repeated consumption of green tea (700 mL/day for 14 days) resulted in decreases of 85% in nadolol peak plasma concentration (Cmax) and systemic exposure (AUC) compared to administration with water. The renal clearance of nadolol was not altered. Green tea also markedly reduced the effects of nadolol on systolic blood pressure.

MANAGEMENT: Based on available data, patients should be advised to limit their consumption of green tea and green tea extracts during treatment with nadolol.


  1. Roth M, Timmermann BN, Hagenbuch B "Interactions of green tea catechins with organic anion-transporting polypeptides." Drug Metab Dispos 39 (2011): 920-6
  2. Misaka S, Yatabe J, Muller F, et al. "Green tea ingestion greatly reduces plasma concentrations of nadolol in healthy subjects." Clin Pharmacol Ther 95 (2014): 432-8

ALPRAZolam food

Applies to: Xanax (alprazolam)

Grapefruit and grapefruit juice may interact with ALPRAZolam and lead to potentially dangerous side effects. Discuss the use of grapefruit products with your doctor. Do not increase or decrease the amount of grapefruit products in your diet without first talking to your doctor. Do not drink alcohol while taking ALPRAZolam. This medication can increase the effects of alcohol. You may feel more drowsy, dizzy, or tired if you take ALPRAZolam with alcohol. Talk to your doctor or pharmacist if you have any questions or concerns.

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Therapeutic duplication warnings

No warnings were found for your selected drugs.

Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.

Drug Interaction Classification

These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan.
Unknown No interaction information available.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.