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Fixed Dose Procedure

Toxicology and poison
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Fixed Dose Procedure (FDP), proposed in 1984, is an assess of a substance's acute oral toxicity using fewer animals with less suffering than the older LD₅₀ test developed in 1927.

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FDP uses about 10 to 20 animals to find the dose producing toxicity signs but not death, and from there predicts the lethal dose. LD₅₀ ("lethal dose 50%") uses about 60 to 80 animals to find a dose killing 50% of animals within a given time. FDP sometimes requires retesting using slightly higher or lower doses.

Category: Toxicology