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Interpretation of the interactions between the two compounds tested using the checkerboard method, based on of the obtained FIC index values.
| FIC Index | Interpretation |
|---|---|
| ≤0.5 | Synergism (SYN) |
| >0.5 to 1.0 | Addition (ADD) |
| >1.0 to ≤2.0 | Indifference (IND) |
| >2.0 | Antagonism (ANT) |
