Antimicrobial formulary management: a case study in a teaching hospital

Area of Science:

• Pharmacoeconomics
• Antimicrobial Stewardship
• Hospital Pharmacy Management

Background:

• Antimicrobial agents represent a significant portion of hospital pharmaceutical expenditures.
• Effective cost containment strategies are crucial for managing healthcare budgets.
• Formulary systems play a key role in controlling medication costs.

Purpose of the Study:

• To evaluate the economic impact of substituting cefoxitin with cefotetan.
• To assess the therapeutic equivalence and safety of cefotetan compared to cefoxitin.
• To implement and manage a formulary change for cost reduction.

Main Methods:

• The Pharmacy and Therapeutics Committee replaced cefoxitin with cefotetan based on cost and therapeutic equivalence.
• Drug usage guidelines and educational materials were developed and distributed.
• A direct formulary interchange was implemented, automatically converting cefoxitin orders to cefotetan.

Main Results:

• No unanticipated treatment failures or adverse effects were observed during the first 12 months of cefotetan use.
• The formulary interchange resulted in documented cost savings of $4229,811.
• Successful implementation of drug usage guidelines and staff education facilitated the transition.

Conclusions:

• The formulary replacement of cefoxitin with cefotetan is a viable cost-containment strategy.
• Therapeutic interchange of antimicrobial agents can achieve substantial financial savings without negatively impacting patient outcomes.
• This initiative demonstrates the effectiveness of formulary management in optimizing pharmaceutical budgets.