English to Polish Medical Medical: Pharmaceuticals

Co może oznaczać tutaj "principle":

Also, when two or more active substances or principles are to be used as part of a combined treatment regimen, each of the substances or principles may be administered in the same amount and according to the same regimen as used when the compound or principle is used on its own, and such combined use may or may not lead to a synergistic effect.

Lub w innym miejscu:

This may, e.g., be useful for avoiding, limiting or reducing any unwanted side-effects that are associated with the use of one or more of the substances or principles when they are used in their usual amounts, while stili obtaining the desired pharmaceutical or therapeutic effect.

Jest tego dość sporo.