Final answer:
The primary nursing concern for a patient taking benzodiazepines is respiratory depression, as these drugs are central nervous system depressants that can significantly depress respiratory function, particularly in cases of overdose or when combined with other depressants.
Step-by-step explanation:
The number one nursing concern for a patient taking benzodiazepines is A) Respiratory depression. Benzodiazepines are central nervous system depressants that can cause various levels of central nervous system depression, ranging from sedation and muscle relaxation to hypnosis and respiratory depression. In cases of overdose or when combined with other central nervous system depressants such as alcohol or opioids, the risk of respiratory depression is significantly increased, which can be life-threatening. In addition to respiratory concerns, the long-term use of benzodiazepines can lead to dependence and withdrawal symptoms, making abrupt discontinuation risky.