The Collaborative International Dictionary of English v.0.48:

Drug \Drug\, v. i. [imp. & p. p. Drugged; p. pr. & vb. n.
   Drugging.] [Cf. F. droguer.]
   To prescribe or administer drugs or medicines. --B. Jonson.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

drugging \drugging\ n.
   the administration of a sedative agent or drug.

   Syn: sedation.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

drugging
    n 1: the administration of a sedative agent or drug [syn:
         sedation, drugging]