Multiple drug intolerance syndrome: a large-scale retrospective study.

Area of Science:

• Clinical Pharmacology
• Patient Safety
• Drug Hypersensitivity

Background:

• Multiple drug intolerance syndrome (MDIS) is defined by non-immunological adverse drug reactions to three or more medications.
• Understanding risk factors for MDIS is crucial for improving patient safety and medication management.

Purpose of the Study:

• To identify patient-specific factors associated with an increased risk of developing multiple drug intolerance syndrome (MDIS).

Main Methods:

• Retrospective analysis of inpatient records from an electronic prescribing system over five years.
• Univariable and multivariable analyses were performed to assess risk factors including age, sex, weight, ethnicity, atopy, psychological disorders, and previous admissions.

Main Results:

• Out of 25,695 patients with drug intolerance, 4.9% were diagnosed with MDIS.
• MDIS was significantly more prevalent in women, patients with multiple comorbidities, and those with a history of previous hospital admissions (p < 0.001 for all).
• Drug intolerance to agents other than penicillin was associated with a higher likelihood of MDIS (p < 0.001).

Conclusions:

• Female gender, multiple comorbidities, and previous hospital admissions are significant predictors of MDIS.
• A documented penicillin allergy did not correlate with an increased risk of MDIS.