TABLE 1.
Gyssen’s algorithms for evaluation of the appropriateness of antimicrobial drug therapy.
| Category | Reason categorisation |
|---|---|
| I | Agree with the use of antimicrobial therapy/ prophylaxis, the prescription is definitely appropriate |
| II | The antimicrobial drug therapy/prophylaxis prescription is inappropriate due to: |
| IIa | 1. improper dosage |
| IIb | 2. improper dosage interval |
| IIc | 3. improper route |
| III | The antimicrobial drug therapy/prophylaxis prescription is inappropriate due to: |
| IIIa | 1. excessive length |
| IIIb | 2. duration too short |
| IV | The antimicrobial drug therapy/prophylaxis prescription is inappropriate due to: |
| IVa | 1. more effective alternative agent (Aa): specify |
| IVb | 2. less toxic Aa: specify |
| IVc | 3. less expensive Aa: specify |
| IVd | 4. less broad spectrum Aa: specify |
| V | The antimicrobial drug therapy/prophylaxis prescription is unjustified: use of any antimicrobial is not indicated |
| VI | Records insufficient for categorisation. |
Gyssens IC, Van Den Broek PJ, Kullberg B-J, Hekster YA, Van Der Meer JW. Optimizing antimicrobial therapy. A method for antimicrobial drug use and evaluation. J Antimicrob Chemother. 1992;30(5):724–727. https://doi.org/10.1093/jac/30.5.724