Sucralfate with Quinidine Interaction Details

Brand Names Associated with Sucralfate

  • Carafate®
  • Sucralfate

Brand Names Associated with Quinidine

  • Cardioquin®
  • Cin-Quin®
  • Duraquin®
  • Quinact®
  • Quinaglute®
  • Quinalan®
  • Quinatime®
  • Quinidex®
  • Quinidine
  • Quinora®

Medical Content Editor
Last updated Nov 25, 2023

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Interaction Effect

Decreased quinidine effectiveness

Interaction Summary

Subtherapeutic levels of quinidine occurred even though sucralfate was separated by 2 hours from the quinidine dosage. When separated by at least four hours quinidine levels returned to therapeutic levels. Clinicians should be aware that sucralfate may reduce the bioavailability of quinidine.

Severity

Minor

Onset

Delayed

Evidence

Probable

How To Manage Interaction

Concurrent administration of quinidine and sucralfate is not recommended. If concurrent use cannot be avoided, sucralfate should be taken at least four hours after quinidine.

Mechanism Of Interaction

Decreased quinidine absorption

Literature Reports

A) Subtherapeutic levels of digoxin, quinidine, and warfarin occurred in a 71-year-old patient, even though the administration of sucralfate was separated by 2 hours from the other agents. Following hospitalization, sucralfate was administered 4 hours apart from the remainder of the therapeutic regimen and was subsequently discontinued; digoxin and quinidine levels returned to therapeutic levels and the prothrombin time improved. Clinicians should be aware that sucralfate may reduce the bioavailability of other drugs, even if the administration times are staggered .

Sucralfate Overview

  • Sucralfate is used to treat and prevent the return of duodenal ulcers (ulcers located in first part of the small intestine). Treatment with other medications, such as antibiotics, may also be necessary to treat and prevent the return of ulcers caused by a certain type of bacteria (H. pylori) Sucralfate is in a class of medications called protectants. It sticks to damaged ulcer tissue and protects against acid and enzymes so healing can occur.

See More information Regarding Sucralfate

Quinidine Overview

  • Quinidine is used to treat certain types of irregular heartbeats. Quinidine is in a class of medications called antiarrhythmic medications. It works by making your heart more resistant to abnormal activity.

See More information Regarding Quinidine

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Definitions

Severity Categories

Contraindicated

These drugs, generally, should not be used together simultaneously due to the high risk of severe adverse effects. Combining these medications can lead to dangerous health outcomes and should be strictly avoided unless otherwise instructed by your provider.


Major

This interaction could result in very serious and potentially life-threatening consequences. If you are taking this drug combination, it is very important to be under close medical supervision to minimize severe side effects and ensure your safety. It may be necessary to change a medication or dosage to prevent harm.


Moderate

This interaction has the potential to worsen your medical condition or alter the effectiveness of your treatment. It's important that you are monitored closely and you potentially may need to make adjustments in your treatment plan or drug dosage to maintain optimal health.


Minor

While this interaction is unlikely to cause significant problems, it could intensify side effects or reduce the effectiveness of one or both medications. Monitoring for changes in symptoms and your condition is recommended, and adjustments may be made if needed to manage any increased or more pronounced side effects.

Onset

Rapid: Onset of drug interaction typically occurs within 24 hours of co-administration.

Delayed: Onset of drug interaction typically occurs more than 24 hours after co-administration.

Evidence

Level of documentation of the interaction.

Established: The interaction is documented and substantiated in peer-reviewed medical literature.

Theoretical: This interaction is not fully supported by current medical evidence or well-documented sources, but it is based on known drug mechanisms, drug effects, and other relevant information.

How To Manage The Interaction

Provides a detailed discussion on how patients and clinicians can approach the identified drug interaction as well as offers guidance on what to expect and strategies to potentially mitigate the effects of the interaction. This may include recommendations on adjusting medication dosages, altering the timing of drug administration, or closely monitoring for specific symptoms.

It's important to note that all medical situations are unique, and management approaches should be tailored to individual circumstances. Patients should always consult their healthcare provider for personalized advice and guidance on managing drug interactions effectively.

Mechanism Of Interaction

The theorized or clinically determined reason (i.e., mechanism) why the drug-drug interaction occurs.

Disclaimer: The information provided on this page is for informational purposes only and should not be considered medical advice. Always consult with a qualified healthcare professional regarding your specific circumstances and medical conditions.

Where Does Our Information Come From?

Information for our drug interactions is compiled from several drug compendia, including:

The prescribing information for each drug, as published on DailyMED, is also used. 

Individual drug-drug interaction detail pages contain references specific to that interaction. You can click on the reference number within brackets '[]' to see what reference was utilized.

The information posted is fact-checked by HelloPharmacist clinicians and reviewed quarterly.