23rd February 2024

A 78-year-old man is admitted to the post-surgical ward following a total hip replacement.

A 78-year-old man is admitted to the post-surgical ward following a total hip replacement. During the postoperative period, he develops confusion and agitation and begins to tear away his venous cannula. The senior nurse in charge decides to administer IM haloperidol to reduce his agitation. Soon after administration, the patient calms down but develops a unilateral pill-rolling tremor as well as rigidity in his upper limbs.

State one drug that should be started immediately to treat this new condition.