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Table 1 Fixed proportions, equieffective and theoretically additive, used for the combination of both drugs

From: Antinociceptive interaction of (±)-CPP and propentofylline in monoarthritic rats

Fixed proportions n Equieffective dose (μg) Theoretically additive (μg)
   PPF (±)-CPP PPF + (±)-CPP
1 6 1.42 3.97 5.39
1/3 6 0.47 1.32 1.79
1/10 6 0.14 0.4 0.54
1/30 6 0.05 0.13 0.18
1/100 6 0.01 0.04 0.05
  1. N, number of rats.