Sucralfate and Theophylline Interaction

Understanding the Sucralfate and Theophylline Interaction

FDA-approved prescribing information for these two drugs flags their combination as a major-severity interaction. Sucralfate belongs to the Mucosal Protective Agent class and Theophylline belongs to the Methylxanthine Bronchodilator class - two categories that can collide when co-prescribed. The mechanism described in FDA labeling is: Sucralfate can coat the stomach or bind to theophylline, which prevents the medicine from being fully absorbed into your bloodstream. Severity tiers matter: major flags generally advise avoidance, moderate flags often require monitoring or dose adjustment, and minor flags may only call for awareness.

Context around a specific patient determines real-world impact. Sucralfate has 20 total documented interactions on file in this dataset, and Theophylline has 86. Each additional medication compounds the interaction surface, which is why pharmacists run full-profile checks rather than evaluating one pair at a time. FDA-derived guidance for this pair is: Your doctor may recommend spacing these medications several hours apart to make sure theophylline works correctly. Timing of doses, renal and hepatic function, age, and other concurrent prescriptions all shape whether a labeled interaction matters clinically.

An interaction flag is not a verdict. A large share of labeled interactions are managed routinely in clinical practice, the fix may be as simple as spacing doses or adding a monitoring test. Others require the prescriber to choose a different medication entirely. This page surfaces FDA-sourced labeling and openFDA data for educational purposes only; it is not medical advice and cannot account for your full clinical picture. Never start, stop, or adjust either Sucralfate or Theophylline based on a web page, speak with your prescriber or pharmacist before making any change.