A comparison of potential psychiatric drug interactions from six drug interaction database programs

Area of Science:

• Pharmacology
• Clinical Informatics
• Drug Safety

Background:

• Drug-drug interactions (DDIs) pose significant risks, particularly when psychiatric drugs are involved.
• Physicians rely on drug interaction database programs to identify potential DDIs.
• Lack of a standardized DDI classification system leads to variability in database outputs.

Purpose of the Study:

• To compare the categorization of potential DDIs across six commercial drug interaction database programs.
• To assess the agreement and reliability of DDI categorization, focusing on interactions involving psychiatric drugs.

Main Methods:

• Evaluated 100 drug interaction pairs, including those with psychiatric and non-psychiatric drugs.
• Compared DDI categories assigned by 3 subscription and 3 open-access database programs.
• Utilized percent agreement and Fleiss' kappa for interrater reliability analysis.

Main Results:

• Overall percent agreement for DDI categorization was 66%, indicating fair interrater reliability.
• Agreement was substantial for severe-rated DDIs but fair for major-rated DDIs.
• Categorization of DDIs involving psychiatric drugs frequently differed among the evaluated programs.

Conclusions:

• Significant variability exists in how drug interaction databases categorize potential DDIs, especially for psychiatric drug combinations.
• Physicians should cross-reference multiple drug interaction database programs due to inconsistent results.
• Improved standardization in DDI classification is needed to enhance clinical decision-making.