Influencing drug use through prescribing restrictions

Area of Science:

• Pharmacoeconomics
• Health Services Research
• Drug Utilization Studies

Background:

• Drug restriction policies are implemented to control medication use and costs.
• Benzodiazepines and cephalosporins are commonly prescribed antibiotic and psychotropic medications.
• Evaluating the impact of specific restrictions is crucial for optimizing drug stewardship.

Purpose of the Study:

• To assess the effectiveness of various drug restriction policies on benzodiazepine and cephalosporin utilization.
• To identify which types of restrictions were most successful in reducing drug dispensing.
• To understand the factors influencing the success of drug restriction strategies.

Main Methods:

• Analysis of computerized drug-use data from a federal hospital over a 10-year period (1972-1981).
• Evaluation of five distinct drug restriction policies: diazepam countersignature, cephalothin sodium formulary deletion, cefazolin sodium countersignature, cefazolin sodium justification, and amended diazepam restrictions.
• Comparison of drug dispensing rates before and after policy implementation.

Main Results:

• All implemented drug restriction policies led to a decrease in dispensed drug units.
• The most effective restrictions were the chief of staff countersignature for diazepam and the deletion of cephalothin sodium from the formulary.
• Policy effectiveness correlated with the enforcer's influence, perceived restriction importance, and ease of drug acquisition.

Conclusions:

• Formulary deletion and mandatory countersignature policies are potent strategies for reducing drug use.
• The success of drug restriction policies is influenced by the authority of the enforcer and prescriber-perceived barriers to access.
• Targeted interventions like formulary management and restricted prescribing can significantly alter drug utilization patterns.