Prescribe vs Galenical - What's the difference?

As a verb prescribe

is to order (a drug or medical device) for use by a particular patient.

a medicinal preparation concocted mostly out of herbs or vegetable matter, after galen, the greek physician and writer of the second century.

* (archaic)

* The pronunciation with the stressed first syllable is normally used only when added distinction from (proscribe) is required.

(prescrib)

To order (a drug or medical device) for use by a particular patient.

The doctor prescribed aspirin.

To specify as a required procedure or ritual; to lay down authoritatively as a guide, direction, or rule of action.

* Shakespeare

Prescribe not us our duties.

* Dryden

Let streams prescribe their fountains where to run.

(en noun)

A vegetable or herbal remedy as prescribed by ; a simple cure.