National Dental Examining Board of Canada (NDEB) Practice Exam

Premedication prior to general anesthesia is used to lessen metabolic activity, depress reflex irritability, and control excess salivation. This helps to reduce the risk of adverse reactions during anesthesia and promotes a smoother induction and recovery process. It does not increase metabolic activity (option A) or induce immediate anesthesia (option C). In addition, premedication is not intended to provide long-term analgesia (option D), as this is typically achieved through other medications or techniques during the surgery. Overall, option B best describes the purposes of premedication prior to general anesthesia.