Final answer:
The important nursing action for the administration of a benzodiazepine as a sedative-hypnotic agent is to monitor geriatric patients for the common occurrence of paradoxical reactions.
Step-by-step explanation:
The important nursing action for the administration of a benzodiazepine as a sedative-hypnotic agent is to monitor geriatric patients for the common occurrence of paradoxical reactions. Benzodiazepines can sometimes have the opposite effect in older adults, causing agitation, confusion, and hallucinations. It is crucial for nurses to be vigilant and recognize these reactions in order to provide appropriate care.