These preparations are a remnant of the days of polypharmacy.
polypharmacy, pol-i-fr′ma-si n. the prescribing of too many medicines.
They corrected the polypharmacy of the Arabs and restored natural modes of cure to their proper place.
The formularies of the Middle Ages encouraged this so-called "polypharmacy."
polypharmacy pol·y·phar·ma·cy (pŏl'ē-fär'mə-sē)
The mixing of many drugs in one prescription.