Evaluation of neuropharmacological activity of plant extract using behavioral models like (EPM, Hole board, Hole cross, Forced swim and Tail suspension test) is it mandatory to use same route for precise result?

As we know that, all groups within one experiment should always receive drugs via the same route of administration, according to the same treatment scheme and of the same volume.

But a lot of references are available where two different routes were used.

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