The Collaborative International Dictionary of English v.0.48:

Galenic \Ga*len"ic\, Galenical \Ga*len"ic*al\, a. [From Galen,
   the physician.]
   Relating to Galen or to his principles and method of treating
   diseases. --Dunglison.
   [1913 Webster]

   Galenic pharmacy, that branch of pharmacy which relates to
      the preparation of medicines by infusion, decoction, etc.,
      as distinguished from those which are chemically prepared.
      [1913 Webster]