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Interpretation of combination index values in drug combinations.8
| Combination index value | Interpretation |
|---|---|
| <0.1 | Very strong synergism |
| 0.1–0.3 | Strong synergism |
| 0.3–0.7 | Synergism |
| 0.7–0.85 | Moderate synergism |
| 0.85–09 | Slight synergism |
| 0.9–1.1 | Nearly additive |
| 1.1–1.45 | Slight to moderate antagonism |
| 1.45–3.3 | Antagonism |
| 3.3–10 | Strong antagonism |
| >10 | Very strong antagonism |
