Butorphanol and Codeine Interaction

Understanding the Butorphanol and Codeine Interaction

FDA-approved prescribing information for these two drugs flags their combination as a minor-severity interaction. Butorphanol belongs to the Opioid Agonist-Antagonist class and Codeine belongs to the Opioid Analgesic class - two categories that can collide when co-prescribed. The mechanism described in FDA labeling is: Butorphanol can block the pain-relieving effects of codeine and may cause sudden, uncomfortable withdrawal symptoms. 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. Butorphanol has 11 total documented interactions on file in this dataset, and Codeine has 27. 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: Avoid using these two medicines at the same time to ensure your pain is managed safely. 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 Butorphanol or Codeine based on a web page, speak with your prescriber or pharmacist before making any change.