A Client on the Unit Suddenly Cries Out in Fear

A client on the unit suddenly cries out in fear. The nurse notices that the client's head is twisted to one side, his back is arched, and his eyes have rolled back in their sockets. The client has recently begun drug therapy with haloperidol (Haldol) . Based on this assessment, the first action of the nurse would be to

A) get a stat. order for a serum drug level.
B) hold the client's medication until the symptoms subside.
C) place an urgent call to the client's physician.
D) give a PRN dose of benztropine (Cogentin) IM.